The present disclosure relates to the field of acoustic outputs, and in particular to an acoustic output device.
Currently, wearable devices with acoustic output devices are emerging and becoming more and more popular. In particular, due to the health and safety features, there are more and more open binaural acoustic output devices (e.g., bone conduction speakers) to facilitate sound conduction to users. However, the bone conduction speaker has the problem of sound leakage in the mid-low frequency range.
Therefore, it is desirable to provide an acoustic output device that can reduce sound leakage and improve the audio experience of users.
Embodiments of the present disclosure provide an acoustic output device comprising: a bone conduction acoustic assembly used to generate a bone conduction sound wave; an air conduction acoustic assembly used to generate an air conduction sound wave; and a housing used to accommodate at least a portion of elements of the bone conduction acoustic assembly and the air conduction acoustic assembly. The housing may include a first chamber and a second chamber, the first chamber being used to accommodate at least a portion of the bone conduction acoustic assembly, the housing may be provided with a sound outlet communicated with the second chamber. The air conduction sound wave may be transmitted to an outside of the acoustic output device via the sound outlet. A frequency response curve of the air conduction sound wave may have at least one resonance peak, a peak resonance frequency of the at least one resonance peak may be greater than or equal to 1 kHz.
In some embodiments, the air conduction acoustic assembly may include at least one diaphragm, the at least one diaphragm being connected to the bone conduction acoustic assembly or the housing, the air conduction sound wave being generated based on a vibration of the at least one diaphragm or the housing.
In some embodiments, the at least one diaphragm may separate a chamber of the housing into the first chamber and the second chamber.
In some embodiments, the housing may be further provided with at least one pressure relief hole communicated with the first chamber.
In some embodiments, the at least one pressure relief hole may include a first pressure relief hole and a second pressure relief hole. The first pressure relief hole may be provided farther away from the sound outlet than the second pressure relief hole, an effective area of an outlet end of the first pressure relief hole may be larger than an effective area of an outlet end of the second pressure relief hole.
In some embodiments, the sound outlet and the first pressure relief hole may be located on opposite sides of the bone conduction acoustic assembly.
In some embodiments, the housing may include a first side wall, a second side wall, a third side wall, and a fourth side wall. The side wall and the second side wall are disposed on opposite sides of the bone conduction acoustic assembly, the third side wall and the fourth side wall are connected to the first side wall and the second side wall and spaced apart from each other. The sound outlet and the first pressure relief hole is provided on the first side wall and the second side wall, respectively, and the second pressure relief hole is provided on the third side wall or the fourth side wall.
In some embodiments, the at least one pressure relief hole may further include a third pressure relief hole. The effective area of the outlet end of the second pressure relief hole is larger than an effective area of an outlet end of the third pressure relief hole, the second pressure relief hole and the third pressure relief hole are provided on the third side wall and the fourth side wall, respectively.
In some embodiments, an actual area of the outlet end of the first pressure relief hole may be greater than an actual area of the outlet end of the second pressure relief hole, and the actual area of the outlet end of the second pressure relief hole may be greater than an actual area of the outlet end of the third pressure relief hole.
In some embodiments, the housing may be further provided with at least one tuning hole communicated with the second chamber, the peak resonance frequency of the at least one resonance peak when the at least one tuning hole is in an open state is shifted to high frequency compared to the peak resonance frequency of the at least one resonance peak when the at least one tuning hole is in a closed state.
In some embodiments, an offset towards high frequency may be greater than or equal to 500 Hz.
In some embodiments, the offset towards high frequency may be greater than or equal to 1 kHz.
In some embodiments, the peak resonance frequency of the at least one resonance peak when the at least one tuning hole is in the open state may be greater than or equal to 2 kHz.
In some embodiments, the at least one tuning hole may include a plurality of tuning holes, and a sum of effective areas of outlet ends of the plurality of tuning holes may be greater than or equal to 1.5 mm2.
In some embodiments, the housing may include a first side wall and a second side wall disposed on opposite sides of the bone conduction acoustic assembly. The at least one tuning hole may include a first tuning hole, the sound outlet and the first tuning hole being disposed on the first side wall and the second side wall, respectively.
In some embodiments, the housing further may include a third side wall and a fourth side wall connecting the first side wall and the second side wall and spaced apart from each other. The at least one tuning hole may further include a second tuning hole, the second tuning hole being provided on the third side wall or the fourth side wall.
In some embodiments, an effective area of an outlet end of the first tuning hole may be larger than an effective area of an outlet end of the second tuning hole.
In some embodiments, an actual area of the outlet end of the first tuning hole may be larger than an actual area of the outlet end of the second tuning hole.
In some embodiments, the actual area of the outlet end of the first tuning hole may be greater than or equal to 3.8 mm2; and/or, the actual area of the outlet end of the second tuning hole may be greater than or equal to 2.8 mm2.
In some embodiments, the outlet ends of the first tuning hole and the second tuning hole may be both covered with an acoustic resistance net, a porosity of the acoustic resistance net being less than or equal to 16%.
In some embodiments, the housing may be provided with at least one pressure relief hole communicated with the first chamber. The at least one tuning hole and the at least one pressure relief hole may form at least one pair of adjacent holes, each pair of adjacent holes including one of the at least one tuning hole and one of the at least one pressure relief hole arranged adjacent to each other, and an interval distance between the tuning hole and the pressure relief hole in each pair of adjacent holes may be less than or equal to 2 mm.
In some embodiments, in each pair of adjacent holes, an effective area of an outlet end of the pressure relief hole may be greater than an effective area of an outlet end of the sound tuning hole.
In some embodiments, in each pair of adjacent holes, an actual area of the outlet end of the pressure relief hole may be greater than an actual area of the outlet end of the sound tuning hole; and/or, the outlet ends of the adjacent provided pressure relief hole and the tuning hole may be respectively covered with a first acoustic resistance net and a second acoustic resistance net, a porosity of the first acoustic resistance net being greater than a porosity of the second acoustic resistance net.
In some embodiments, a ratio of the effective area of the outlet end of the pressure relief hole to the effective area of the outlet end of the tuning hole may be less than or equal to 2.
In some embodiments, a frequency response curve of an air conduction sound output to the outside of the acoustic output device via the at least one pressure relief hole may have a first resonance peak, and a frequency response curve of an air conduction sound output to the outside of the acoustic output device via the tuning hole may have a second resonance peak, a peak resonance frequency of the first resonance peak and a peak resonance frequency of the second resonance peak may be respectively greater than or equal to 2 kHz.
In some embodiments, a ratio of a difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak to the peak resonance frequency of the first resonance peak may be less than or equal to 60%.
In some embodiments, each of the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak may be greater than or equal to 3.5 kHz.
In some embodiments, the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak may be less than or equal to 2 kHz.
In some embodiments, the acoustic output device may further include a sound conduction component connected to the housing, the sound conduction component being provided with a sound guiding channel, the sound guiding channel being communicated with the sound outlet and being used to guide the air conduction sound wave to the outside of the acoustic output device.
In Some Embodiments, a Length of the Sound Guiding Channel May be Between 2 Mm and 5 mm.
In some embodiments, a cross-sectional area of the sound conducting channel may be greater than or equal to 4.8 mm2.
In some embodiments, the cross-sectional area of the sound guiding channel may increase gradually along a transmission direction of the air conduction sound wave.
In some embodiments, a cross-sectional area of an inlet end of the sound guiding channel may be greater than or equal to 10 mm2; or a cross-sectional area of an outlet end of the sound guiding channel may be greater than or equal to 15 mm2.
In some embodiments, a ratio of a volume of the sound guiding channel to a volume of the second chamber may be between 0.05 and 0.9.
In some embodiments, along a vibration direction of the bone conduction acoustic assembly, a distance from an outlet end of the sound guiding channel to an inner wall of the housing away from a skin contact region may be greater than or equal to 3 mm.
In some embodiments, an outlet end of the sound guiding channel may be covered with an acoustic resistance net, a porosity of the acoustic resistance net may be greater than or equal to 13%.
In some embodiments, the housing may be provided with at least one pressure relief hole communicated with the first chamber. An effective area of an outlet end of the sound guiding channel may be greater than or equal to a sum of an effective area of an outlet end of each of the at least one pressure relief hole communicated with the first chamber on the housing.
In some embodiments, a ratio of the sum of the effective area of the outlet end of each of the at least one pressure relief hole to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.15.
In some embodiments, a porosity of the acoustic resistance net covering the outlet end of the sound guiding channel may be greater than or equal to a porosity of the acoustic resistance net covering the outlet end of any one of at least a portion of the at least one pressure relief hole.
In some embodiments, the housing may be provided with at least one tuning hole communicated with the second chamber. An effective area of an outlet end of the sound guiding channel may be greater than an effective area of an outlet end of each tuning hole in the at least one tuning hole.
In some embodiments, the effective area of the outlet end of the sound guiding channel may be greater than a sum of an effective area of the outlet end of each of the at least one tuning hole.
In some embodiments, a ratio of the sum of the effective area of the outlet end of each of the at least one tuning hole to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.08.
In some embodiments, a porosity of the acoustic resistance net covering the outlet end of the sound guiding channel may be greater than a porosity of the acoustic resistance net covering the outlet end of any one of the at least one tuning hole.
In some embodiments, the bone conduction acoustic assembly may include a magnetic circuit system and a coil assembly, wherein the magnetic circuit system may form a magnetic gap, the coil assembly may be provided in the first chamber and may extend into the magnetic gap, and the coil assembly may be provided with at least one communication hole.
In some embodiments, the at least one communication hole may be located on a portion of the coil assembly located outside the magnetic gap.
In some embodiments, the coil assembly may include a coil and a coil support. The coil support may be used to connect the coil to the housing and to make the coil extend into the magnetic gap. The at least one communication hole may be provided on the coil support.
In some embodiments, the bone conduction acoustic assembly may further include an elastic element located in the first chamber. A central region of the elastic element may be connected to the magnetic circuit system, and a peripheral region of the elastic element may be connected to the housing, thereby suspending the magnetic circuit system within the housing.
In some embodiments, the coil support may include a main part and a first support part. The main part may be connected to the elastic element, one end of the first support part may be connected to the main part, the coil may be connected to the other end of the first support part away from the main part, and the at least one communication hole may be located at a connection position between the main part and the first support part.
In some embodiments, the at least one communication hole may include multiple communication holes, the multiple communication holes being disposed at intervals along an annulus direction of the coil assembly.
In some embodiments, each communication hole may have a cross-sectional area greater than or equal to 2 mm2.
In some embodiments, the housing may be provided with a pressure relief hole communicated with the first chamber, a frequency response curve of an air conduction sound output via the pressure relief hole to the outside of the acoustic output device may have a resonance peak, the at least one communication hole may be provided so that the peak resonance frequency of the resonance peak is greater than or equal to 2 kHz.
In some embodiments, the peak resonance frequency of the resonance peak when the at least one communication hole is in an open state may be shifted to high frequency compared to the peak resonance frequency of the resonance peak when the at least one communication hole is not provided, and an offset to high frequency may be greater than or equal to 500 HZ.
In some embodiments, the acoustic output device may further include: a communication channel communicating the first chamber with the second chamber, a peak resonance frequency of the at least one resonance peak when the communication channel is in an open state being shifted to high frequency compared to the peak resonance frequency of the at least one resonance peak when the communication channel is in a closed state, an offset to high frequency being greater than or equal to 500 Hz.
In some embodiments, the frequency response curve of the air conduction sound output to the outside of the acoustic output device via the sound outlet may have a resonance peak, the peak resonance frequency of the resonance peak being greater than or equal to 2 kHz.
In some embodiments, the communication channel may include a hole array disposed on the diaphragm, at least part of holes in the hole array and the sound outlet being disposed on opposite sides of the bone conduction acoustic assembly, respectively.
In some embodiments, an actual area of at least one hole in the hole array may be between 0.01 mm2 and 0.04 mm2.
In some embodiments, the bone conduction acoustic assembly may include a magnetic circuit system and a coil assembly, the magnetic circuit system may form a magnetic gap, the coil assembly may be provided in the first chamber and may extend into the magnetic gap, the communication channel may run through the magnetic circuit system such that the first chamber is communicated with the second chamber.
In some embodiments, the housing may be further provided with a pressure relief hole communicated with the first chamber and a tuning hole communicated with the second chamber, the communication channel being provided outside of the housing and connecting the pressure relief hole and the tuning hole.
In some embodiments, an acoustic resistance net may be arranged in a communication path defined by the communication channel, a porosity of the acoustic resistance net being less than or equal to 18%.
The present disclosure is further illustrated in terms of exemplary embodiments. These exemplary embodiments are described in detail with reference to the drawings. These embodiments are not limited. In these embodiments, the same number represents the same structure, wherein:
The technical schemes of embodiments of the present disclosure will be more clearly described below, and the accompanying drawings need to be configured in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are merely some examples or embodiments of the present disclosure, and will be applied to other similar scenarios according to these accompanying drawings without paying creative labor. Unless obviously obtained from the context or the context illustrates otherwise, the same numeral in the drawings refers to the same structure or operation.
It should be understood that the “system,” “device,” “unit” and/or “module” used herein is a method for distinguishing different components, elements, components, parts or assemblies of different levels. However, if other words may achieve the same purpose, the words may be replaced by other expressions.
As shown in the present disclosure and claims, unless the context clearly prompts the exception, “a,” “one,” and/or “the” is not specifically singular, and the plural may be included. It will be further understood that the terms “comprise,” “comprises,” and/or “comprising,” “include,” “includes,” and/or “including,” when used in the present disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The flowcharts are used in the present disclosure to illustrate the operations performed by the system according to the embodiment of the present disclosure. It should be understood that the preceding or following operations are not necessarily performed in order to accurately. Instead, the operations may be processed in reverse order or simultaneously. Moreover, one or more other operations may be added to the flowcharts. One or more operations may be removed from the flowcharts.
Embodiments of the present disclosure relate to an acoustic output device. The acoustic output device may include a bone conduction acoustic assembly, an air conduction acoustic assembly, and a housing configured to accommodate at least a portion of elements of the bone conduction acoustic assembly and the air conduction acoustic assembly. In some embodiments, the bone conduction acoustic assembly may be used to generate a bone conduction sound wave. When the bone conduction acoustic assembly generates the bone conduction sound wave, the air conduction acoustic assembly may generate an air conduction sound wave based on the vibration of the housing and/or the bone conduction acoustic assembly. In some embodiments, by arranging one or more acoustic structures (e.g., a sound outlet, a pressure relief hole, a tuning hole, a sound guiding channel, a communication hole, etc.) in the acoustic output device, the quality of the sound output from the acoustic output device can be improved, the sound of the acoustic output device at a mid-low frequency can be enriched, and the leakage of the acoustic output device can be reduced, thereby improving an audio experience of a user. For example, the housing of the acoustic output device may include a first chamber (also known as a front chamber) and a second chamber (also known as a rear chamber). The housing may be provided with a sound outlet communicated with the second chamber, and the air conduction sound wave may be transmitted to an outside of the acoustic output device via the sound outlet. In some embodiments, a frequency response curve of the air conduction sound wave may have at least one resonance peak, and a peak resonance frequency of the at least one resonance peak may be greater than or equal to 1 kHz. As another example, a side wall of the housing of the acoustic output device may also be provided with at least one pressure relief hole communicated with the first chamber, and the pressure relief hole may regulate the pressure in the first chamber by facilitating the communication between the first chamber and the outside of the acoustic output device, thereby helping to regulate the frequency response of the air conduction acoustic assembly in a low frequency range. In some embodiments, a number, a size, a shape, a position, etc., of one or more acoustic structures (e.g., the sound outlet, the pressure relief hole, the tuning hole, the sound guiding channel, the communication hole, etc.) in the acoustic output device may be adjusted to optimize the frequency response curve of the acoustic output device, thereby improving the quality of the sound output from the acoustic output device. For example, a distance between the pressure relief hole communicated with the first chamber and the tuning hole communicated with the second chamber in the acoustic output device may be small (e.g., the pressure relief hole and the tuning hole may be provided on two adjacent side walls of the housing), so that the air conduction sound waves output to the outside of the acoustic output device via the pressure relief hole and the tuning hole, respectively, interfere and cancel each other as much as possible in a high frequency range (e.g., 2 kHz-4 kHz), thereby reducing the sound leakage of the acoustic output device and improving the sound quality of the acoustic output device.
The multimedia platform 110 may communicate with one or more components of the acoustic output system 100 or an external data source (e.g., a cloud data center). In some embodiments, the multimedia platform 110 may provide data or signals (e.g., audio data of music) to the acoustic output device 130 and/or the user terminal 140. In some embodiments, the multimedia platform 110 may be used for data/signal processing of the acoustic output device 130 and/or the user terminal 140. In some embodiments, the multimedia platform 110 may be implemented on a single server or a group of servers. The group of servers may be a centralized server group connected to the network 120 via a distributed server group of one or more access points. In some embodiments, the multimedia platform 110 may be locally connected to the network 120 or remotely connected to the network 120. For example, the multimedia platform 110 may access information and/or data stored in the acoustic output device 130, the user terminal 140, and/or the storage device 150 via the network 120. As another example, the storage device 150 may be used as back-end data storage for the multimedia platform 110. In some embodiments, the multimedia platform 110 may be implemented on a cloud platform. Merely by way of example, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-tier cloud, or the like, or any combination thereof.
In some embodiments, the multimedia platform 110 may include a processing device 112. The processing device 112 may perform the primary functions of the multimedia platform 110. For example, the processing device 112 may retrieve audio data from the storage device 150 and send the retrieved audio data to the acoustic output device 130 and/or the user terminal 140 to generate sound. In other embodiments, the processing device 112 may process signals from the acoustic output device 130 (e.g., generate control signals).
In some embodiments, the processing device 112 may include one or more processing units (e.g., a single-core processing device or a multi-core processing device). By way of exemplary illustration only, the processing device 112 may include a central processing unit (CPU), a specialized integrated circuit (ASIC), a specialized instruction set processor (ASIP), a graphics processing unit (GPU), a physical processing unit (PPU), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a controller microcontroller unit, a reduced instruction set computer (RISC), a microprocessor, etc., or any combination thereof.
The network 120 may facilitate the exchange of information and/or data. In some embodiments, one or more components of the acoustic output system 100 (e.g., the multimedia platform 110, the acoustic output device 130, the user terminal 140, the storage device 150) may send information and/or data to other components of the acoustic output system 100 via the network 120. In some embodiments, the network 120 may be any type of wired or wireless network, or a combination thereof. By way of exemplary illustration only, the network 120 may include a wired network, a wired network, a fiber optic network, a telecommunication network, an Intranet, the Internet, a local area network (LAN), a wide area network (WAN)), a wireless local area network (WLAN), a metropolitan area network (MAN), a wide area network (WAN), a public switched telephone network (PSTN), a Bluetooth network, a ZigBee network, a near field communication (NFC) network, etc., or any combination thereof. In some embodiments, the network 120 may include one or more network access points. For example, the network 120 may include a wired or wireless network access point such as a base station and/or an Internet exchange point, and one or more components of the acoustic output system 100 may be connected to the network 120 to exchange data and/or information.
The acoustic output device 130 may output sound to and interact with the user. In some embodiments, the acoustic output device 130 may provide at least an audio content, such as a song, a poem, a news broadcast, a weather broadcast, an audio lesson, etc., to the user. In some embodiments, the user may provide feedback to the acoustic output device 130 via, for example, a key, a screen touch, a body movement, a voice, a gesture, a thought, etc. In some embodiments, the acoustic output device 130 may be a wearable device. Unless otherwise stated, as used herein, the wearable device may include a headset and various other types of personal devices, such as a head-worn device, a shoulder-worn device, or a body-worn device. The wearable device may provide at least an audio content to the user with or without contacting the user. In some embodiments, the wearable device may include a smart headset, a head mountable display (HMD), a smart bracelet, a smart shoe, a smart watch, a smart suit, a smart backpack, a smart accessory, a virtual reality headset, etc., or any combination thereof.
The acoustic output device 130 may be in communication with the user terminal 140 via the network 120. In some embodiments, various types of data and/or information may be received by the acoustic output device 130 from the user, e.g., a gesture (e.g., a handshake gesture, a head shake gesture, etc.), etc. In some embodiments, the various types of data and/or information may include, but are not limited to, a movement parameter (e.g., a geographic position, a movement direction, a movement speed, an acceleration, etc.), a voice parameter (a volume of the voice, a content of the voice, etc.), etc. In some embodiments, the acoustic output device 130 may also send the received data and/or information to the multimedia platform 110 or the user terminal 140. For more information about the acoustic output device 130, please refer to the detailed description elsewhere in the present application, e.g.,
In some embodiments, the user terminal 140 may be customized, for example, by installing an application in the user terminal 140. The application may be used to communicate with the acoustic output device 130 and process data and/or signals. The user terminal 140 may include a mobile device 130-1, a tablet computer 130-2, a laptop computer 130-3, a built-in device 130-4 in a vehicle, etc., or any combination thereof. In some embodiments, the mobile device 130-1 may include a smart home device, a smart mobile device, etc., or any combination thereof. In some embodiments, the smart home device may include a smart lighting device, a smart appliance control device, a smart surveillance device, a smart TV, a smart camera, an intercom, etc., or any combination thereof. In some embodiments, the smart mobile device may include a smart phone, a personal digital assistant (PDA), a gaming device, a navigation device, etc., or any combination thereof. In some embodiments, the built-in device 130-4 in the vehicle may include a built-in computer, a built-in television, a built-in tablet, etc. In some embodiments, the user terminal 140 may include a signal transmitter and a signal receiver configured to communicate with a positioning device (not shown in the figure) that locates the user and/or the position of the user terminal 140. In some embodiments, the multimedia platform 110 or the storage device 150 may be integrated into the user terminal 140. In this case, the functions that can be achieved by the multimedia platform 110 described above can be similarly implemented through the user terminal 140.
The storage device 150 may store data and/or instructions. In some embodiments, the storage device 150 may store data obtained from the multimedia platform 110, the acoustic output device 130, and/or the user terminal 140. In some embodiments, the storage device 150 may store data and/or instructions for various functions that can be performed by the multimedia platform 110, the acoustic output device 130, and/or the user terminal 140. In some embodiments, the storage device 150 may include a mass storage device, a removable memory, a volatile read-write memory, a read-only memory (ROM), etc., or any combination thereof. Exemplary mass storage devices may include a disk, an optical disk, a solid-state drive, etc. Exemplary removable memories may include a flash drive, a floppy disk, an optical disk, a memory card, a zip disk, a magnetic tape, etc. Exemplary volatile read-write memories may include a random-access memory (RAM). Example RAM may include a dynamic random-access memory (DRAM), a double data rate synchronous dynamic random-access memory (DDRSDRAM), a static random-access memory (SRAM), a thyristor random access memory (T-RAM), and a zero-capacitance random access memory (Z-RAM), etc. Exemplary ROM may include a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a compact disc ROM (CD-ROM), and a digital multifunction disk ROM, etc. In some embodiments, the storage device 150 may be implemented on a cloud platform. Merely by way of example, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-tier cloud, etc., or any combination thereof. In some embodiments, one or more components of the acoustic output system 100 may access data and/or instructions stored in the storage device 150 via the network 120. In some embodiments, the storage device 150 may be directly connected to the multimedia platform 110 as back-end storage.
In some embodiments, the multimedia platform 110, the network 120, the user terminal 140, and/or the storage device 150 may be integrated into the acoustic output device 130. Specifically, with the advancement of technology and the improvement of the processing capability of the acoustic output device 130, all processing may be performed by the acoustic output device 130. For example, the acoustic output device 130 may be a smart headset, an MP3 player, etc., with highly integrated electronic elements such as a central processing unit (CPU), a graphics processing unit (GPU), etc.
In some embodiments, the ear hook 210 may include an elastic support member that may be used to hang the acoustic output device 200 on the ear when the user wears the acoustic output device 200. The elastic support member may be configured to hold the ear hook 210 in a shape that matches the user's ear, such that the ear hook 210 may produce a matching elastic deformation based on the shape of the ear and the shape of the user's head. When the user wears the acoustic output device 200, the elastic support member may accommodate users with different ear shapes and head shapes. In some embodiments, the elastic support member may be made of a memory alloy with a good deformation recovery capability. The memory alloy refers to a material composed of two or more metallic elements that have a shape memory effect through thermos-elasticity and martensitic phase transformation and their inversion. In some embodiments, the memory alloy may include, but is not limited to, any one or more of nickel-titanium alloy, copper-zinc alloy, iron-manganese alloy, nickel-aluminum alloy, gold-cadmium alloy, etc. In some embodiments, the elastic support member may also be a support member made of other materials (e.g., an organic polymer material). In some embodiments, the organic polymer material may include any one or more of rubber, chemical fiber, plastic, etc. In some embodiments, the elastic support member may also be made of a non-memory alloy. In some embodiments, a wire in the elastic support member may establish an electrical connection between the acoustic assembly 250 and other components (e.g., the control circuit 260, the battery 270, etc.) to facilitate power and data transmission of the acoustic assembly 250. In some embodiments, the ear hook 210 may further include a protective sleeve 211 and a housing protection member 212 integrally formed with the protective sleeve 211, wherein the protective sleeve 211 is wrapped around an outside of the elastic support member and the housing protection member 212 covers an outside of the housing 220 and is adapted to the housing 220.
The housing 220 may be configured to accommodate the acoustic assembly 250. In some embodiments, the acoustic assembly 250 may include a bone conduction acoustic assembly, an air conduction acoustic assembly, etc. The bone conduction acoustic assembly may be configured to output a sound wave (also referred to as a bone conduction sound wave) through a solid medium (e.g., a bone). For example, the bone conduction acoustic assembly may convert an audio signal (e.g., an electrical signal) into a vibration and transmit it to a bone (e.g., the skull) of the user. In some embodiments, the bone conduction acoustic assembly may include a magnetic circuit system, one or more vibration plates, and a voice coil. The magnetic circuit system may generate a magnetic field such that the voice coil located in a magnetic gap vibrates under the action of the magnetic field, and the vibration of the voice coil may drive the one or more vibration plates to vibrate. At least one of the one or more vibration plates may be physically connected to the housing 220, which may contact the skin of the user (e.g., the skin on the user's head) and transfer the bone conduction sound wave to the cochlea of the user wearing the acoustic output device 200. The air conduction acoustic assembly may be configured to output a sound wave through the air (also referred to as an air conduction sound wave). For example, the air conduction acoustic assembly may convert vibrations of the housing 220, the bone conduction acoustic assembly, and/or the air in the housing 220 into air vibrations that can be received through the user's ear. In some embodiments, the air conduction acoustic assembly may include at least one diaphragm, and the diaphragm may be physically connected to the bone conduction acoustic assembly and/or the housing 220. Since, the bone conduction acoustic assembly (e.g., one or more vibration plates) vibrates to generate the bone conduction sound wave, the vibration of the bone conduction acoustic assembly (e.g., one or more vibration plates) may drive the vibration of the housing 220 and/or the diaphragm physically connected to the bone conduction acoustic assembly and/or the housing 220. The vibration of the diaphragm may cause vibration of the air in the housing 220. The vibration of the air in the housing 220 may be transmitted from the housing 220 to generate the air conduction sound wave. For more information about the bone conduction acoustic assembly and the air conduction acoustic assembly, please refer to the detailed descriptions elsewhere in the present disclosure, e.g.,
In some embodiments, a count of the acoustic assemblies 250 and housings 220 may be two, which may respectively correspond to the left and right ears of the user and adjacent regions thereof. In some embodiments, the count of the acoustic assemblies 250 and housings 220 may also be one, which may be distributed over the user's left or right ear and adjacent regions thereof when the user is wearing the acoustic output device 200. For more information about the acoustic assembly 250, please refer to the detailed descriptions elsewhere in the present disclosure, for example,
In some embodiments, the housing 220 may be provided with a contact surface 221. The contact surface 221 may be in contact with the user's skin. In some embodiments, the contact surface 221 may also be referred to as an upper surface of the housing 220, a skin contact region, etc. A surface of the housing 220 opposite to the upper surface of the housing 220 may also be referred to as a rear surface or back surface of the housing 220. The bone conduction sound wave generated by one or more bone conduction acoustic assemblies of the acoustic assembly 250 in the acoustic output device 130 may be transmitted externally through the contact surface 221 of the housing 220. In some embodiments, a material and thickness of the contact surface 221 may affect the transmission of the bone conduction sound wave to the user, thereby affecting the sound quality. For example, if the material of the contact surface 221 is relatively flexible, the transmission of the bone conduction sound wave in a low frequency range may be superior to the transmission of the bone conduction sound wave in a high frequency range. Conversely, if the material of the contact surface 221 is relatively stiff, the transmission of the bone conduction sound wave in the high frequency range may be superior to the transmission of the bone conduction sound wave in the low frequency range.
The bone conduction acoustic assembly 310 may be used to generate a bone conduction sound wave. In some embodiments, the bone conduction acoustic assembly 310 may generate a bone conduction sound wave in a specific frequency range (e.g., a low frequency range, a middle frequency range, a high frequency range, a mid-low frequency range, a mid-high frequency range, etc.) in response to a control signal generated by a signal processing module. In some embodiments, the bone conduction sound wave may refer to a sound wave that is conducted in the form of mechanical vibration through a solid medium (e.g., bone). In some embodiments, the low frequency range (also referred to as a low frequency) may refer to a frequency range of 20 Hz-150 Hz, the middle frequency range (also referred to as a middle frequency) may refer to a frequency range of 150 Hz-5 kHz, the high frequency range (also referred to as a high frequency) may refer to a frequency range of 5 kHz-20 kHz, the mid-low frequency range (also referred to as a mid-low frequency) may refer to a frequency range of 150 Hz-500 Hz, and the mid-high frequency range (also referred to as a mid-high frequency) may refer to a frequency range of 500 Hz to 5 kHz. As another example, the low frequency range may refer to a frequency range of 20 Hz-300 Hz, the middle frequency range may refer to a frequency range of 300 Hz-3 kHz, the high frequency range may refer to a frequency range of 3 kHz-20 kHz, the mid-low frequency range may refer to a frequency range of 100 Hz-1000 Hz, and the mid-high frequency range may refer to a frequency range of 1000 Hz-10 kHz. It should be noted that the values of the frequency ranges are used for illustrative purposes only and are not limiting. The above definition of frequency range may vary according to different application scenarios and different classification criteria. For example, in some other application scenarios, the low frequency range may be a frequency range of 20 Hz-80 Hz, the middle frequency range may be a frequency range of 160 Hz-1280 Hz, the high frequency range may be a frequency range of 2560 Hz-20 kHz, the mid-low frequency range may be a frequency range of 80 Hz-160 Hz, and the mid-high frequency range may be a frequency range of 1280 Hz-2560 Hz. Optionally, the different frequency ranges may or may not have overlapping frequencies. For more information about the bone conduction acoustic assembly 310, please refer to elsewhere in the present disclosure, e.g.,
The air conduction acoustic assembly 320 may be used to generate an air conduction sound wave. In some embodiments, the air conduction acoustic assembly 320 may generate the air conduction sound wave based on the vibration of the bone conduction acoustic assembly 310, the vibration of the housing 330 accommodating the bone conduction acoustic assembly 310 and the air conduction acoustic assembly 320, the vibration of the air within the housing 330, and/or a control signal. In some embodiments, the air conduction acoustic assembly 320 may generate the air conduction sound wave in the same or a different frequency range than the vibration of the bone conduction acoustic assembly 310. In some embodiments, the air conduction acoustic assembly 320 may include at least one diaphragm. The at least one diaphragm may be connected to the bone conduction acoustic assembly 310 or the housing 330, and the air conduction sound wave may be generated based on the vibration of the at least one diaphragm or the housing 330. In some embodiments, the air conduction sound wave may refer to a sound wave that is conducted by air vibration. For more information about the air conduction acoustic assembly 320, please refer to elsewhere in the present specification, e.g.,
The housing 330 may be used to accommodate at least a portion of the elements in the bone conduction acoustic assembly 310 and the air conduction acoustic assembly 320. In some embodiments, the housing 330 may include a first chamber and a second chamber separated by the diaphragm in the air conduction acoustic assembly 320. In some embodiments, the housing 330 may include a first portion and a second portion. The first portion of the housing 330 and the diaphragm may form the first chamber. The bone conduction acoustic assembly 310 may be placed within the first chamber. The first portion of the housing 330 (e.g., one or more vibration plates) surrounding the first chamber may be physically connected to the bone conduction acoustic assembly 310. The first portion of the housing 330 may transfer a vibration from the bone conduction acoustic assembly 310 to the user's bones when the user wears the acoustic output device 300. The second portion of the housing 330 and the diaphragm may form the second chamber. The air conduction sound wave generated by the air conduction acoustic assembly 320 may be transmitted from the second chamber to the outside of the acoustic output device 300. In some embodiments, the first chamber and the second chamber may not communicate. In some embodiments, the first chamber and the second chamber may communicate, for example, the diaphragm may be provided with one or more communication holes. In some embodiments, the first chamber may be used to accommodate at least a portion of the bone conduction acoustic assembly 310, the housing 330 is provided with one or more sound outlets communicated with the second chamber, and the air conduction sound wave may be transmitted to the outside of the acoustic output device 300 via the sound outlet(s). In some embodiments, when the user wears the acoustic output device 300, the sound outlet(s) may face an external ear canal of the user's ear such that the air conduction sound wave may be transmitted to the user's cochlea via the sound outlet(s).
In some embodiments, the acoustic output device 300 may also include a signal processing module. The bone conduction acoustic assembly 310 may be electrically connected to the signal processing module to receive a control signal (e.g., an audio signal) and generate the bone conduction sound wave based on the control signal. For example, the bone conduction acoustic assembly 310 may include any element (e.g., a vibration motor, an electromagnetic vibration device, etc.) that converts an electrical signal into a mechanical vibration signal. Exemplary signal conversion manners may include, but are not limited to, an electromagnetic type (e.g., a moving coil type, a moving iron type, a magnetostrictive type), a piezoelectric type, an electrostatic type, etc. An internal structure of the bone conduction acoustic assembly 310 may be a single resonance system or a composite resonance system. In some embodiments, the bone conduction acoustic assembly 310 may generate a mechanical vibration in response to a bone conduction control signal. The mechanical vibration may generate the bone conduction sound wave.
In some embodiments, the bone conduction acoustic assembly 410 may include a magnetic circuit system 411, one or more vibration plates 412, and a voice coil 413. The magnetic circuit system 411 may include one or more magnetic elements and/or magnetic conduction elements configured to generate a magnetic field. In some embodiments, the magnetic circuit system 411 may include a magnetic gap. The magnetic circuit system 411 may generate a magnetic field in the magnetic gap, and the voice coil 413 may be located in the magnetic gap. At least one of the one or more vibration plates 412 may be physically connected to the housing 420. The housing 420 may contact the skin of the user (e.g., the skin on the user's head) and transfer the bone conduction sound wave to the cochlea of the user wearing the acoustic output device 400. In some embodiments, one of the vibration plates 412 may also be referred to as a top wall of the housing 420. As described herein, when the user wears the acoustic output device, a wall of the housing closest to the skin may be referred to as the top wall or a front wall (also referred to as a region in contact with the user's skin, a contact surface, etc.). A wall furthest from the skin (e.g., the wall opposite the top wall) is referred to as a bottom wall or a rear wall. A chamber in the housing corresponding to the top wall of the housing may be referred to as a front chamber (e.g., the first chamber), which is close to a skin region where the user comes in contact with the housing. A chamber corresponding to the bottom wall may be referred to as a rear chamber (e.g., the second chamber), which is away from the skin region where the user comes in contact with the housing. The voice coil 413 may be mechanically connected to the one or more vibration plates 412. In some embodiments, the voice coil 413 may also be electrically connected to a signal processing module. When an electric current (which may represent a control signal) is introduced into the voice coil 413, the voice coil 413 may vibrate in the magnetic field and drive the one or more vibration plates 412 to vibrate. The vibrations of the one or more vibration plates 412 may be transmitted through the housing 420 to the bones of the user to generate the bone conduction sound wave. In some embodiments, the vibrations of the one or more vibrating plates 412 may cause vibration of the housing 420 and/or the magnetic circuit system 411. The vibration of the housing 420 and/or the magnetic circuit system 411 may cause the vibration of the air in the housing 420.
The air conduction acoustic assembly may include a diaphragm 431. The diaphragm 431 may be physically connected to the bone conduction acoustic assembly 410 and/or the housing 420. For example, the diaphragm 431 may be connected to at least one of the magnetic circuit system 411, the voice coil 413, and/or the one or more vibration plates 412. When the bone conduction acoustic assembly 410 (e.g., the one or more vibration plates 412) vibrates to generate the bone conduction sound wave, the vibration of the bone conduction acoustic assembly 410 (e.g., the one or more vibration plates 412) may drive the vibration of the housing 420 and/or the diaphragm 431 physically connected to the bone conduction acoustic assembly 410 and/or the housing 420. The vibration of the diaphragm 431 may cause vibration of the air in the housing 420. The air vibration in the housing 420 may be transmitted from the housing 420 to generate an air conduction sound wave. The air conduction sound wave and the bone conduction sound wave may represent the same audio signal that is input into the bone conduction acoustic assembly 410, or the same audio signal received by the user. In the present disclosure, the air conduction sound wave and the bone conduction sound wave represent the same audio signal means that the air conduction sound wave and the bone conduction sound wave represent the same voice content, which may be represented by frequency components of the air conduction sound wave and the bone conduction sound wave. In some embodiments, the frequency components in the air conduction sound wave and the bone conduction sound wave may be different. For example, the bone conduction sound wave may include more low frequency components and the air conduction sound wave may include more high frequency components. In some embodiments, the diaphragm 431 may be physically connected to the magnetic circuit system 411. The diaphragm 431 and the magnetic circuit system 411 may be considered fixed. The vibration of the diaphragm 431 relatives to the housing 420 may result in a pressure change in the first chamber 423 and the second chamber 424, resulting in the air vibration in the first chamber 423 and the second chamber 424. In some embodiments, the diaphragm 431 may be physically connected to the magnetic circuit system 411. The housing 420 may be considered fixed. The vibrations of the diaphragm 431 and the magnetic circuit system 411 relatives to the housing 420 may cause a pressure change in the first chamber 423 and the second chamber 424, thereby causing the air vibration in the first chamber 423 and the second chamber 424.
In some embodiments, the diaphragm 431 may include a primary portion and an auxiliary portion. The primary portion may be physically connected to a bottom surface of the magnetic circuit system 411 away from the top wall of the housing 420. In some embodiments, the primary portion of the diaphragm 431 may include a plate (e.g., a circular or an annular plate) that may cover at least a portion of the bottom surface of the magnetic circuit system 411. In some embodiments, the primary portion of the diaphragm 431 may include a plate (e.g., a circular or an annular plate) that may cover at least a portion of the bottom surface of the magnetic circuit system 411 and a side wall connected to a side wall of the magnetic circuit system 411. In some embodiments, the auxiliary portion of the diaphragm 431 may be in a shape of a ring around the primary portion of the diaphragm 431. The auxiliary portion of the diaphragm 431 may be physically connected to the housing 420. For example, an inner side of the auxiliary portion of the diaphragm 431 may be in contact with or connected to an outer side of the primary portion of the diaphragm 431, and an outer side of the auxiliary portion of the diaphragm 431 may be physically connected to the housing 420. In some embodiments, the auxiliary portion of the diaphragm 431 may include at least one of a convex region or a recessed region. In some embodiments, the diaphragm 431 may be a film made of a material that is sensitive to vibration. In some embodiments, the material of the diaphragm 431 may include Polycarbonate (PC), Polyamides (PA), Acrylonitrile Butadiene Styrene (ABS), Polystyrene. PS), High Impact Polystyrene (HIPS), Polypropylene (PP), Polyethylene Terephthalate (PET), Polyvinyl Chloride (PVC), Polyurethane (PU), Polyethylene (PE), Phenol Formaldehyde (PF), Urea-Formaldehyde (UF), Melamine-Formaldehyde (MF), Polyarylate (PAR), Polyetherimide (PEI), Polyimide (PI), Polyethylene Naphthalate two formic acid glycol ester (PEN), Polyetheretherketone (PEEK), silicone, etc., or a combination thereof.
In some embodiments, the acoustic output device 400 may generate the bone conduction sound wave under the action of the bone conduction acoustic assembly 410, and the bone conduction sound wave may have a frequency response curve that may have at least one resonance peak. The bone conduction sound wave generated by the acoustic output device 400 in contact with the skin contact region has a first frequency response curve (shown as “k1+k2” in
|f1−f2|/f1≤50%, (1)
where f1 denotes a peak resonance frequency of a resonance peak of the bone conduction sound wave generated when the diaphragm 413 is connected to the bone conduction acoustic assembly 410 and the housing 420, and f2 denotes a peak resonance frequency of a resonance peak of the bone conduction sound wave generated when the diaphragm 413 is disconnected from either of the bone conduction acoustic assembly 410 or the housing 420. It should be noted that a value of the relationship |f1−f2|/f1 between the peak resonance frequency f1 and the peak resonance frequency f2 in the above equation (1) may also be less than or equal to other values, e.g., 60%, 40%, 30%, 20%, etc. In some embodiments, a difference between a peak resonance intensity corresponding to the peak resonance frequency f1 and a peak resonance intensity corresponding to the peak resonance frequency f2 may be less than or equal to 5 dB. In some embodiments, the difference between the peak resonance intensity corresponding to the peak resonance frequency f1 and the peak resonance intensity corresponding to the peak resonance frequency f2 may also be less than or equal to any other value, e.g., 3 dB, 4 dB, 6 dB, etc. It can also be understood that |f1−f2|/f1 may be used to measure the magnitude of the effect of the diaphragm 413 on the vibration generated by the bone conduction acoustic assembly 410 to the skin contact region of the user. The smaller the value of |f1−f2|/f1 is, the smaller the effect of the diaphragm 413 on the vibration received by the skin contact region of the user by the bone conduction acoustic assembly 410 is. It may also be understood that setting the diaphragm 413 in the acoustic output device 400 substantially does not bring a strong sense of vibration, thus ensuring a better experience for the user when wearing the acoustic output device 400. Therefore, on the basis of not affecting the original resonance system of the acoustic output device 400 as much as possible, the introduction of the diaphragm 413 enables the acoustic output device 400 to simultaneously output the bone conduction sound wave and the air conduction sound wave having the same phase or similar phases, thereby improving the acoustic performance of the acoustic output device 400 and making the acoustic output device 400 more energy efficient. By way of exemplary illustration, an offset in a low frequency range or a mid-low frequency range (e.g., f1≤500 Hz) in the frequency response curve may meet a certain condition so that the low frequency and the mid-low frequency of the bone conduction sound wave are not affected as much as possible. In some embodiments, the offset in the low frequency range or the mid-low frequency range (e.g., f1≤500 Hz) of the frequency response curve may be less than or equal to 50 Hz, i.e., |f1−f2|≤50 Hz, so that the diaphragm 413 does not interfere as much as possible with the bone conduction acoustic assembly 410 to generate a vibration in the skin contact region of the user. In some embodiments, the offset in the low frequency range or the mid-low frequency range (e.g., f1≤500 Hz) in the frequency response curve may be greater than or equal to 5 Hz, i.e., |f1−f2|≥5 Hz, so that the diaphragm 413 has a certain structural strength and elasticity to reduce the fatigue deformation of the diaphragm 413 during use, thereby extending the service life of the diaphragm 413. It should be noted that in some embodiments, the skin contact region may include at least a portion of a housing region where the housing 420 is in contact with the skin of the user when the user is wearing the acoustic output device 400. For example,
In some embodiments, the housing 420 may include at least one sound outlet 421. The at least one sound outlet 421 may be used to transmit the air conduction sound wave from the second chamber 424 to the outside of the acoustic output device 400. In some embodiments, the at least one sound outlet 421 may be provided on a side wall of the second portion of the housing 420, and the at least one sound outlet 421 may be communicated with the second chamber 424. In some embodiments, a number of the at least one sound outlet 421 may be one or more. Due to the interaction between the magnetic field and the voice coil 413, the magnetic circuit system 411 may also receive a corresponding reaction force to vibrate and drive the diaphragm 431 to vibrate. The vibration of the diaphragm 431 may cause air in the second chamber 424 to vibrate. The air vibration in the second chamber 424 may generate the air conduction sound wave in the second chamber 424, and the air conduction sound wave may be transmitted from the second chamber 424 to the outside of the acoustic output device 400 through the at least one sound outlet 421.
In some embodiments, when the interaction action between the voice coil 413 and the magnetic circuit system 411 (i.e., the vibration of the voice coil 413 under the magnetic field provided by the magnetic circuit system 411) causes the housing 420 to move towards a front side of the acoustic output device 400 (i.e., along a direction indicated by arrow A or towards the user's skin) and the diaphragm 431 (it may be considered that the housing 420 moves in a direction indicated by arrow A, and the magnetic circuit system 411 and diaphragm 431 are immobile), the first chamber 423 in housing 420 becomes larger, the second chamber 424 becomes smaller, and a pressure in the second chamber 424 increases. When the housing 420 moves towards the user's skin, the pressure of the one or more of the vibration plates 412 acting on the user's skin may increase, and the bone conduction sound wave generated by the bone conduction acoustic assembly 410 may be defined as being in “positive phase.” Similarly, the air conduction sound wave generated by the air conduction acoustic assembly may also be in “positive phase” due to the increased pressure in the second chamber 424. In some embodiments, the air conduction sound wave and the bone conduction sound wave may be in the same phase, i.e., a phase difference between the air conduction sound wave and the bone conduction sound wave may be equal to zero. In some embodiments, the phase difference between the air conduction sound wave and the bone conduction sound wave may be less than a threshold, e.g., π, 2π/3, 1π/2, etc. As used in the present disclosure, the phase difference between the air conduction sound wave and the bone conduction sound wave may refer to an absolute value of the difference between phases of the air conduction sound wave and the bone conduction sound wave. In some embodiments, difference frequency ranges of the air conduction sound wave and the bone conduction sound wave may correspond to different phase differences and different thresholds. For example, the phase difference between the air conduction sound wave and the bone conduction sound wave in a frequency range less than 300 Hz may be less than Tr. As another example, the phase difference between the air conduction sound wave and the bone conduction sound wave in a specific frequency range less than 1000 Hz (e.g., 300 Hz-1000 Hz) may be less than 2π/3. As yet another example, the phase difference between the air conduction sound wave and the bone conduction sound wave in a specific frequency range less than 3000 Hz (e.g., 1000 Hz-3000 Hz) may be less than 1π/2. Thus, the synchronization between the bone conduction sound wave and the air conduction sound wave may be increased so that the bone conduction sound wave and the air conduction sound wave may be superimposed, thereby improving the hearing effect.
In some embodiments, an actual area of an outlet end of the sound outlet 421 may be greater than or equal to 8 mm2 so that the user can hear more of the air conduction sound wave output via the sound outlet 421. In other embodiments, the actual area of the outlet end of the sound outlet 421 may also be greater than or equal to any other value, e.g., 10 mm2, 9 mm2, 7 mm2, 6 mm2, etc. In some embodiments, an actual area of an inlet end of the sound outlet 421 may also be greater than or equal to the actual area of the outlet end thereof. In some embodiments, a damping structure (also referred to as an acoustic resistance net) (e.g., a tuning net, etc.) may be provided at the sound outlet 421 to improve the acoustic effect of the air conduction acoustic assembly. In some embodiments, an output feature of the air conduction sound wave may be adjusted by adjusting a number, a position, a size, and/or a shape of the sound outlet 421. It should be noted that an actual area of an outlet end in the embodiments of the present disclosure may be defined as a size of an area of an end surface where the outlet end is located, and an actual area of an inlet end in the embodiments of the present disclosure may be defined as a size of an area of an end surface where the inlet end is located. The area of the end surface where the outlet end is located may be understood as the area where the vibration can pass through the end surface of the outlet end with air as the medium. The area of the end where the inlet end is located may be understood as the area where vibration can pass through the end surface of the inlet end with air as the medium.
In some embodiments, the output feature of the bone conduction sound wave may be adjusted by adjusting a stiffness (e.g., a structural size, a material elastic modulus, etc.) of the vibration plate 412 and/or housing 420. In some embodiments, the output feature of the air conduction sound wave may be adjusted by adjusting a shape, an elastic coefficient, and a damping of the diaphragm 431.
Referring to
In some embodiments, the number of pressure relief holes may be multiple. By way of exemplary illustration only, the at least one pressure relief hole may include a first pressure relief hole and a second pressure relief hole. The first pressure relief hole may be provided away from the sound outlet 421 compared to the second pressure relief hole. An effective area of an outlet end of the first pressure relief hole may be greater than an effective area of an outlet end of the second pressure relief hole. The effective area here, as well as an effective area of a particular channel (e.g., a sound guiding channel, etc.) or opening (e.g., a sound outlet, a tuning hole, a communication hole, etc.) introduced below, may be defined as a product of its actual area and a porosity of the covered acoustic resistance net, i.e., an area through which air can penetrate. For example, when an outlet end of a pressure relief hole is covered with an acoustic resistance net, the effective area of the outlet end of the pressure relief hole is the product of the actual area of the outlet end of the pressure relief hole and the porosity of the covered acoustic resistance net. As another example, when the outlet end of the pressure relief hole is not covered with the acoustic resistance net, the effective area of the outlet end of the pressure relief hole is the actual area of the outlet end of the pressure relief hole. Similarly, the effective area of the outlet end of the communication hole such as the sound guiding channel and the tuning hole mentioned later may be defined as the product of the actual area and the corresponding porosity respectively, which is not repeated here.
In some embodiments, the sound outlet 421 and the first pressure relief hole may be disposed on opposite sides of the bone conduction acoustic assembly 410, respectively. In some embodiments, the housing 420 of the acoustic output device 400 may include a first side wall, a second side wall, a third side wall, and a fourth side wall. The first side wall and the second side wall may be disposed on opposite sides of the bone conduction acoustic assembly 410. The third side wall and the fourth side wall are connected to the first side wall and said second side wall and spaced apart from each other. The sound outlet 421 and the first pressure relief hole may be disposed on the first side wall and the second side wall, respectively, and the second pressure relief hole may be disposed on the third side wall or the fourth side wall. In some embodiments, the at least one pressure relief hole may also include a third pressure relief hole. The effective area of the outlet end of the second pressure relief hole is larger than an effective area of an outlet end of the third pressure relief hole. The second pressure relief hole and the third pressure relief hole are provided on the third side wall and the fourth side wall, respectively. In some embodiments, the actual area of the outlet end of the first pressure relief hole is larger than the actual area of the outlet end of the second pressure relief hole, and the actual area of the outlet end of the second pressure relief hole is larger than an actual area of the outlet end of the third pressure relief hole.
In some embodiments, the diaphragm 431 may not be connected to the bone conduction acoustic assembly 410, and the peripheral side of the diaphragm 431 is directly physically connected to an inner wall of the housing 420, thereby separating the chamber within the housing 420 into a first chamber 423 and a second chamber 424. In some embodiments, a number of diaphragms 431 may be multiple, e.g., two or three, and the multiple diaphragms may be physically connected to the magnetic circuit system 411 of the bone conduction acoustic assembly 410, thereby separating the chamber inside the housing 420 into the first chamber 423 and the second chamber 424. For the situation when the diaphragms 431 are two, please refer to
As shown in
In some embodiments, to ensure the sound quality, a frequency response curve of the acoustic output device 600 should be relatively flat over a wide frequency range, that is, a resonance peak needs to be at a higher frequency as much as possible. The frequency response curve of the air conduction sound wave output to the outside of the acoustic output device 600 through the sound outlet 621 has a resonance peak. A peak resonance frequency of the resonance peak may be greater than or equal to 1 kHz. Preferably, the peak resonance frequency may be greater than or equal to 2 kHz, thus enabling the acoustic output device 600 to have a good speech output effect. More preferably, the peak resonance frequency may be greater than or equal to 3.5 kHz, thus enabling the acoustic output device 600 to have a good music output effect. Further preferably, the peak resonance frequency may also be greater than or equal to 4.5 kHz.
In order to increase the peak resonance frequency of the acoustic output device 600, in some embodiments, the sound guiding channel is communicated with the second chamber 624 through the sound outlet 621, which can form a Helmholtz resonator structure. The resonance frequency f of the Helmholtz resonator structure and structural parameters of the second chamber 624 and the sound guiding channel may satisfy Equation (2):
f∝[S/(VL+1.7VR)]1/2, (2)
where V denotes a volume of the second chamber 624, S denotes a cross-sectional area of the sound guiding channel, R denotes an equivalent radius of the sound guiding channel, and L denotes the length of the sound guiding channel. The equivalent radius refers to a radius of a circle that is the same as the area of the sound guiding channel when the shape of the sound guiding channel is approximately circular or non-circular. Based on Equation (2), it can be seen that for a certain volume of the second chamber 624, increasing the cross-sectional area of the sound guiding channel and/or decreasing the length of the sound guiding channel can increase the resonance frequency, which in turn allows the air conduction sound wave to move to high frequency.
In some embodiments, the length of the sound guiding channel may be less than or equal to 7 mm. In some embodiments, the length of the sound guiding channel may be less than or equal to 6 mm. Preferably, the length of the sound guiding channel may be between 2 mm and 5 mm.
In some embodiments, along a vibration direction of the bone conduction acoustic assembly 610, a distance between the outlet end of the sound guiding channel and an inner wall (inner surface of the top wall) of the housing 620 away from the skin contact region may be greater than or equal to 3 mm, so that the inverse phase cancellation of the air conduction sound wave at the outlet end of the sound guiding channel by the sound leakage generated by the bottom wall of the housing 620 (i.e., the end surface of the housing 620 corresponding to the second chamber 624) can be avoided.
In some embodiments, the cross-sectional area of the sound guiding channel may be greater than or equal to 4.8 mm2. Preferably, the cross-sectional area of the sound guiding channel may be greater than or equal to 8 mm2. In some embodiments, the cross-sectional area of the sound guiding channel may be gradually increased along an extension direction (i.e., in a transmission direction (i.e., a direction away from the sound outlet 621) of the air conduction sound wave) such that the sound guiding channel may be provided in a trumpet shape to facilitate the guiding of the air conduction sound wave. In some embodiments, the cross-sectional area of the inlet end of the sound guiding channel may be greater than or equal to 10 mm2. In some embodiments, the cross-sectional area of the outlet end of the sound guiding channel may be greater than or equal to 15 mm2. In some embodiments, the length of the sound guiding channel may be 2.5 mm, and the cross-sectional areas of the inlet end and the outlet end of the sound guiding channel may be 15 mm2 and 25.3 mm2, respectively. In some embodiments, a ratio of the volume of the sound guiding channel to the volume of the second chamber 624 may be between 0.05 and 0.9, wherein the volume of the second chamber 624 may be less than or equal to 400 mm3. Preferably, the volume of the second chamber 624 may be between 200 mm3 and 400 mm3. Further, the volume of the second chamber 624 may be 350 mm3. For more information about the sound conduction component, please refer to
In some embodiments, as shown in
In some embodiments, as shown in
It should be noted that a cross-sectional area of a certain point of the sound guiding channel 741 may refer to the smallest area that can be intercepted when the sound guiding channel 741 is cut through this point. In some embodiments, a straight-through sound guiding channel may refer that the whole view of the other end can be observed from any one of its inlet end and the outlet end of the sound guiding channel. For example, with reference to the straight-through sound guiding channel shown in
Referring to
Further, an effective area of a particular hole or opening introduced in the present disclosure may be defined as a product of its actual area and a porosity of the corresponding covered acoustic resistance net. For example, when the outlet end of the sound guiding channel 741 is covered with an acoustic resistance net, the effective area of the outlet end of the sound guiding channel 741 is a product of the actual area of the outlet end of the sound guiding channel 741 and the porosity of the acoustic resistance net; and when the outlet end of the sound guiding channel 741 is not covered with an acoustic resistance net, the effective area of the outlet end of the sound guiding channel 741 is the actual area of the outlet end of the sound guiding channel 741. Similarly, an effective area of an outlet end of a hole such as a pressure relief hole, tuning hole, etc., mentioned later may also be defined as a product of an actual area and the corresponding porosity, which is not repeated here.
In addition to hearing the bone conduction sound wave, the user mainly hears the air conduction sound wave that is output to the outside of the acoustic output device 600 via the sound outlet 621 and the sound guiding channel, rather than the air conduction sound wave that is output to the outside of the acoustic output device 600 via the pressure relief hole 622. In order to make the user hear the air conduction sound wave output through the sound guiding channel in the acoustic output device 600, in some embodiments, the effective area of the outlet end of the sound guiding channel may be larger than the effective area of the outlet end of the pressure relief hole 622.
In some embodiments, a size of the pressure relief hole 622 may affect the smoothness of the exhaust of the first chamber 623 and the difficulty of the vibration of the diaphragm 613, which in turn affects the acoustic performance of the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621. Therefore, when the effective area of the outlet end of the sound guiding channel is constant (e.g., the actual area of the outlet end of the sound guiding channel and/or the porosity of the acoustic resistance net are constant), adjusting the effective area of the outlet end of the pressure relief hole 622 (e.g., the actual area of the outlet end of the pressure relief hole 622 and/or the acoustic resistance of the acoustic resistance net covered thereon) may change the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621. In some embodiments, as the actual area of the outlet end of the pressure relief hole 622 increases, the exhaust of the first chamber 623 becomes smoother and the intensity of the peak resonance in a low frequency range or mid-low frequency range increases. In some embodiments, the exhaust of the first chamber 623 is affected with the addition of an acoustic resistance net covering the outlet end of the pressure relief hole 622, such that the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621 is reduced at a mid-low frequency (e.g., 100 Hz-200 Hz) and the frequency response curve at the mid-low frequency is relatively flat. In some embodiments, the sound leakage at the pressure relief hole may diminish with an increase in the actual area of the outlet end of the pressure relief hole and an increase in the acoustic resistance of the acoustic resistance net.
For example,
As shown in
For example,
As another example,
For example, the size of the pressure relief hole may be relatively large so that the resonance peak (Helmholtz resonance) of the first chamber of the housing may correspond to a higher frequency. In this way, the sound leakage at the mid-low frequency propagating from the pressure relief hole may be suppressed. In some embodiments, the larger the size of the pressure relief hole is, the smaller the acoustic impedance may be, and the smaller the sound pressure value of the air conduction sound wave generated at the pressure relief hole is, which may reduce the sound leakage at the pressure relief hole. In some embodiments, under a condition that the frequency response curve of the air conduction sound wave at the sound conduction component remains substantially unchanged, the size (i.e., the actual area) of the pressure relief hole may be increased, and/or the acoustic resistance of the acoustic resistance net covering the pressure relief hole may be increased, so as to make the sound leakage at the pressure relief hole as small as possible. In some embodiments, under a condition that the effective area of the outlet end of the pressure relief hole is less than or equal to 2.76 mm2, the sound leakage at the pressure relief hole may be reduced by increasing the actual area of the outlet end of the pressure relief hole and the porosity of the acoustic resistance net.
It should be noted that since the size of the housing 620 is limited, a single pressure relief hole 622 cannot be too large. Based on this, as at least one or at least two, for example, three pressure relief holes 622 may be provided.
Based on the detailed description above, the effective area of the outlet end of the sound guiding channel may be greater than the effective area of the outlet end of each pressure relief hole 622 to facilitate the user to hear the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621. Based on the definition of effective area, the actual area of the outlet end of the sound guiding channel may be greater than the actual area of the outlet end of each pressure relief hole 622. Further, the effective area of the outlet end of the sound guiding channel may be greater than or equal to the sum of the effective areas of the outlet ends of all of the pressure relief holes 622. Preferably, a ratio of the sum of the effective areas of the outlet ends of all the pressure relief holes 622 to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.08. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all the pressure relief holes 622 to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.15. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all the pressure relief holes 622 to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.25. In some embodiments, the ratio of the sum of the effective areas of the outlet ends of all the pressure relief holes 622 to the effective area of the outlet end of the sound guiding channel may be greater than or equal to 0.3. By way of exemplary illustration, the effective areas of the outlet ends of all the pressure relief holes 622 may be greater than or equal to 2.5 mm2 to ensure smooth exhaust of the first chamber 623, thereby improving the acoustic performance of the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621 and reducing the sound leakage at the pressure relief hole 622.
In some embodiments, the actual area of the outlet end of the sound guiding channel may be greater than or equal to 4.8 mm2. Preferably, the actual area of the outlet end of the sound guiding channel may be greater than or equal to 8 mm2. In some embodiments, the sum of the actual areas of the outlet ends of all the pressure relief holes 622 may be greater than or equal to 2.6 mm2. In some embodiments, the actual areas of the outlet ends of all the pressure relief holes 622 may be greater than or equal to 10 mm2. When the number of pressure relief holes 622 is one, the sum of the actual areas of the outlet ends of all the pressure relief holes 622 is also the actual area of the outlet end of the one pressure relief hole 114. In some embodiments, the actual area of the outlet end of the sound guiding channel may be 25.3 mm2; three pressure relief holes 622 may be provided, for example, the pressure relief holes 622 may include a first pressure relief hole, a second pressure relief hole, and a third pressure relief hole. The actual areas of the outlet ends of the pressure relief holes may be 11.4 mm2, 8.4 mm2, and 5.8 mm2, respectively.
Referring to
In some embodiments, a tuning hole 626 may also be located on a side wall opposite the side wall of the housing where the sound outlet 621 is located, wherein the tuning hole 626 may increase resonance frequencies of the air in the second chamber 624 and/or the first chamber 623. In some embodiments, the resonance frequencies of the air in the second chamber 624 and the first chamber 623 may be the same. In some embodiments, the resonance frequencies of the air in the second chamber 624 and/or the first chamber 623 may be equal to or greater than 4000 Hz, or equal to or greater than 5000 Hz, etc. In some embodiments, the resonance frequency of the air in the second chamber 624 may be in a range of 5500 Hz-6000 Hz, or in a range of 4000 Hz-6000 Hz, etc. In some embodiments, the resonance frequency of the air in the first chamber 623 may be in a range of 4500 Hz-5000 Hz, or in a range of 4000 Hz-5000 Hz, etc.
In some embodiments, a tuning hole 626 may be a communication hole. At least one of the one or more tuning holes 626 may be covered by an acoustic resistance material (e.g., a tuning cotton). In some embodiments, the acoustic resistance material may include an acoustic resistance in a range of 5 MKS rays-500 MKS rays, or in a range of 10 MKS rays-260 MKS rays, or in a range of 20 MKS rays-200 MKS rays, etc.
In some embodiments, in order to increase the volume of sound output from the sound guiding channel and reduce the volume of sound leakage at a tuning hole 626, a damping structure (e.g., a damping net) may be provided at the tuning hole 626. The damping structure at the tuning hole 626 may be configured to improve the acoustic resistance and regulate (e.g., reduce) the amplitude of the sound wave leaking from the tuning hole 626. When the amplitude of the sound wave leaking from the tuning hole 626 and the amplitude of the sound wave leaking from the pressure relief hole 622 are the same or approximately the same, the sound wave leaking from the tuning hole 626 and the sound wave leaking from the pressure relief hole 622 may cancel each other out, at which point the sound leakage may be reduced and the sound output of the sound guiding channel may be increased. It should be noted that in some embodiments, the number of tuning holes 626 and the number of pressure relief holes 622 may be the same or different.
In some embodiments, the number of tuning holes 626 may be one, for example, the at least one tuning hole 626 may be a first tuning hole, and the sound outlet 621 and the first tuning hole are provided on the first side wall and the second side wall of the housing 620, respectively. In some embodiments, the number of tuning holes 626 may be two, for example, the at least one tuning hole 626 may also include a second tuning hole, and the second tuning hole may be provided on the third side wall or the fourth side wall of the housing 620.
In some embodiments, the diaphragm 631 may not be connected to the bone conduction acoustic assembly 610, and the peripheral side of the diaphragm 631 is directly physically connected to the inner wall of the housing 620, thereby separating chamber within the housing 620 into the first chamber 623 and the second chamber 624. In some embodiments, a number of diaphragms 631 may be multiple, e.g., two or three, and the multiple diaphragms may be physically connected to the magnetic circuit system 611 of the bone conduction acoustic assembly 610, thereby separating the chamber in the housing 620 into the first chamber 623 and the second chamber 624. For more information about the case when the diaphragms 631 are two, please refer to
In some embodiments, the larger the actual area of the outlet end of the tuning hole 626 is, the more obvious the destructive effect of the tuning hole 626 on the above-mentioned high-pressure region is, and the higher the peak resonance frequency of the resonance peak in the frequency response curve is. In some embodiments, the peak resonance frequency of the resonance peak when the tuning hole 626 is in an open state is shifted to high frequency compared to the peak resonance frequency of the resonance peak when the tuning hole 626 is in a closed state, and an offset may be greater than or equal to 500 Hz. Preferably, the aforementioned offset is greater than or equal to 1 kHz. In some embodiments, the peak resonance frequency of the resonance peak when the tuning hole 626 is in the open state may be greater than or equal to 2 kHz, so that the acoustic output device 600 can have a better speech output. Preferably, the peak resonance frequency may be greater than or equal to 3.5 kHz. More preferably, the peak resonance frequency may be greater than or equal to 4.5 kHz. It should be noted that here the tuning hole 626 is in the open state may refer to the case where the housing 620 is provided with a tuning hole and the tuning hole is working normally. Correspondingly, the tuning hole 626 in the closed state may refer to the case where the housing 620 is not equipped with a tuning hole or the housing 620 is equipped with a tuning hole but the tuning hole is closed and cannot work normally.
It should be noted that the size of the housing 620 is limited, a single tuning hole 626 cannot be too large. Based on this, at least one tuning hole 626 may be provided, for example, the aforementioned tuning holes 626 includes a first tuning hole and a second tuning hole. In some embodiments, the tuning hole 626 may also be located in any region between the high and low-pressure regions within the second chamber 624, which is not limited here.
In some embodiments, referring to
In some embodiments, the addition of the acoustic resistance net at the outlet end of the tuning hole 626 may cause a significant increase in the peak resonance intensity in a low frequency range (e.g., 90 Hz-200 Hz) of the frequency response curve, and an increase in the volume of the air conduction sound wave. The peak resonance intensity in the high frequency range (e.g., 500 Hz-1000 Hz) is reduced to a certain extent, resulting in a flatter frequency response curve in the high frequency range and a more balanced sound quality in the high frequency range. In some embodiments, adjusting the effective area of the outlet end of the tuning hole 626 (e.g., the actual area of the outlet end of the tuning hole 626 and/or the acoustic resistance of the acoustic resistance net covered thereon) may cause the air conduction sound wave output to the outside of the acoustic output device 600 via the sound outlet 621 to vary.
Based on the above description, in some embodiments, an effective area of the outlet end of the first tuning hole may be greater than an effective area of the outlet end of the second tuning hole. In some embodiments, an actual area of the outlet end of the first tuning hole may be greater than an actual area of the outlet end of the second tuning hole. In some embodiments, the actual area of the outlet end of the first tuning hole may be greater than or equal to 3.8 mm2, and/or the actual area of the outlet end of the second tuning hole may be greater than or equal to 2.8 mm2. In some embodiments, a sum of effective areas of the outlet ends of all the tuning holes may be greater than or equal to 1.5 mm2. In some embodiments, the outlet ends of the first tuning hole and the second tuning hole may be respectively covered with an acoustic resistance net whose porosity is greater than or equal to 13%. In some embodiments, the outlet ends of the first tuning hole and the second tuning hole may be respectively covered with an acoustic resistance net whose porosity is less than or equal to 16%.
In some embodiments, in conjunction with
In some embodiments, due to the pressure relief hole 622 is communicated with the first chamber 623, and the tuning hole 626 is communicated with the second chamber 624, the phases of the air conduction sound waves output to the outside of the acoustic output device 600 via the pressure relief hole 622 and the tuning hole 626, respectively, may be reversed so that the sound leakage from the pressure relief hole 622 and the tuning hole 626 may be reduced by cancellation interference. In some embodiments, at least a portion of the pressure relief holes 622 and at least a portion of the tuning holes 626 may be provided adjacent to each other (e.g., at least a portion of the pressure relief holes 622 and at least a portion of the tuning holes 626 may be provided on adjacent side walls of the housing 620), such that the air conduction sound waves output to the outside of the acoustic output device 600 via the pressure relief holes 622 and the tuning holes 626 may have destructive interference. In some embodiments, in order to better cause the destructive interference between the sound leakages of the pressure relief hole 622 and the tuning hole 626, a distance between adjacent pressure relief hole 622 and tuning hole 626 may be as small as possible. For example, in some embodiments, a distance between the adjacent pressure relief hole 622 and the tuning hole 626 may be less than or equal to 2 mm. Specifically, a minimum distance between contours of the outlet ends of the adjacent pressure relief hole 622 and the tuning hole 626 may be less than or equal to 2 mm.
In some embodiments, the wavelength of the standing wave in the first chamber 623 is relatively long due to structures such as a coil support is provided in the first chamber 623. The tuning hole 626 and the sound outlet 621 may jointly destroy the high-pressure region, thereby making the wavelength of the standing wave in the second chamber 624 relatively short. Thus, the peak resonance frequency of the first resonance peak may be less than the peak resonance frequency of the second resonance peak. In some embodiments, the air conduction sound waves respectively output to the outside of the acoustic output device 600 via the pressure relief hole 622 and tuning hole 626 may better interfere by shifting the peak resonance frequency of the first resonance peak toward high frequency so as to be closer to the peak resonance frequency of the second resonance peak. In some embodiments, based on the Helmholtz resonator, in the adjacent pressure relief hole 622 and tuning hole 626, the effective area of the outlet end of the pressure relief hole 622 may be larger than the effective area of the outlet end of the tuning hole 626. In some embodiments, in the adjacent pressure relief hole 622 and tuning hole 626, a ratio of the effective area of the outlet end of the pressure relief hole 622 to the effective area of the outlet end of the tuning hole 626 may be less than or equal to 2. By way of exemplary illustration, in the adjacent pressure relief hole 622 and tuning hole 626, the actual area of the outlet end of the pressure relief hole 622 may be larger than the actual area of the outlet end of the tuning hole 626. In some embodiments, the outlet ends of the adjacent pressure relief hole 622 and tuning hole 626 may be covered with a first acoustic resistance net and a second acoustic resistance net, respectively. A porosity of the first acoustic resistance net may be greater than a porosity of the second acoustic resistance net.
In some embodiments, the sound leakage from the tuning hole 626 may also be reduced by adjusting the actual area, the effective area, or the acoustic resistance of the sound guiding channel of the sound conduction component 640 (illustrated in
As illustrated in
As shown in
In some embodiments, outlet ends of at least some of the pressure relief holes (e.g., the pressure relief hole 622) may be covered with an acoustic resistance net to facilitate adjustment of the effective areas of the outlet ends of the pressure relief holes (e.g., the pressure relief hole 622). In this embodiment, the outlet end of each pressure relief hole (e.g., the pressure relief hole 622) covering with an acoustic resistance net of the same acoustic resistance may be taken as an example for exemplary description. Based on this, the actual area of the outlet end of the pressure relief hole (e.g., the pressure relief hole 622) may be adjusted to obtain the corresponding effective area. For example, in some embodiments, the actual area of the outlet end of the first pressure relief hole 6221 may be larger than the actual area of the outlet end of the second pressure relief hole 6222, and the actual area of the outlet end of the second pressure relief hole 6222 may be larger than the actual area of the outlet end of the third pressure relief hole 6223.
As shown in
In some embodiments, outlet ends of at least some of the tuning holes (e.g., the tuning holes 626) may be covered with an acoustic resistance net to facilitate adjustment of the effective areas of the outlet ends of the tuning holes (e.g., the tuning hole 626). In this embodiment, the outlet end of each tuning hole (e.g., the tuning hole 626) is covered with an acoustic resistance net of the same acoustic resistance. Based on this, the actual area of the outlet end of each tuning hole (e.g., the tuning hole 626) may be adjusted to obtain the corresponding effective area. For example, in some embodiments, the actual area of the outlet end of the first tuning hole 6261 may be larger than the actual area of the outlet end of the second tuning hole 6262. Specifically, the actual area of the outlet end of the first tuning hole 6261 may be greater than or equal to 3.8 mm2; and/or the actual area of the outlet end of the second tuning hole 6262 may be greater than or equal to 2.8 mm2.
In some embodiments, in conjunction with
In some embodiments, the effective area of the outlet end of the first pressure relief hole 6221 may be larger than the effective area of the outlet end of the first tuning hole 6261 so that the peak resonance frequency of the air conduction sound wave output to the outside of the acoustic output device via the first pressure relief hole 6221 is shifted as high as possible to be as close as possible to the peak resonance frequency of the air conduction sound wave output to the outside of the acoustic output device via the first tuning hole 6261. The peak resonance frequency of the air conduction sound waves respectively output to the outside of the acoustic output device via the first pressure relief hole 6221 and the first tuning hole 6261 can be better interfered and canceled with each other. Similarly, the effective area of the outlet end of the second pressure relief hole 6222 may be larger than the effective area of the outlet end of the second tuning hole 6262, which is not repeated here.
In some embodiments, similar to the tuning hole (e.g., the tuning hole 626) destroying the high-pressure region in the second chamber (e.g., the second chamber 624), the second pressure relief hole 6222 and the third pressure relief hole 6223 may destroy the high-pressure region in the first chamber (e.g., the first chamber 623), causing the wavelength of the standing wave in the first chamber (e.g., the first chamber 623) to be reduced, thereby making the peak resonance frequency of the air conduction sound wave output to the outside of the acoustic output device via the first pressure relief hole 6221 be shifted toward high frequency so as to be better interfered and cancelled with the air conduction sound wave output to the outside of the acoustic output device via the first tuning hole 6261. Preferably, the above offset may be greater than or equal to 1 kHz. Similarly, the peak resonance frequency of the air conduction sound wave output to the outside of the acoustic output device via the second pressure relief hole 6222 may also be shifted to high frequency. In short, the frequency response curve of the air conduction sound wave output to the outside of the acoustic output device 600 through the pressure relief hole 622 provided adjacent to the tuning hole (e.g., the tuning hole 626) has a resonance peak. The peak resonance frequency of the resonance peak when the pressure relief hole (e.g., the pressure relief hole 622) other than the pressure relief hole (e.g., the pressure relief hole 622) adjacent to the tuning hole (e.g., the tuning hole 626) is in an open state is shifted to high frequency compared to the peak resonance frequency of the resonance peak when the other pressure relief hole 622 is in the closed state. The peak resonance frequency of the resonance peak when the other pressure relief hole 622 is in the closed state may be greater than or equal to 2 kHz. It should be noted that the pressure relief hole 622 is in the open state may refer to the case in which the pressure relief hole 620 is provided and the pressure relief hole is working normally. Correspondingly, the pressure relief hole 622 is in the closed state may refer to the case in which there is no pressure relief hole on the housing 620 or when the housing 620 has a pressure relief hole but it is closed and does not work normally.
It should be noted that the foregoing regarding the number, size, shape, and/or position of one or more additional acoustic structures (e.g., the sound outlet, the sound guiding channel, the pressure relief hole, the tuning hole, etc.) are not limited herein by the present disclosure. In some embodiments, the number, size, shape, and/or position of the one or more additional acoustic structures may be optimized based on the sound leakage of the acoustic output device. In some embodiments, the optimization may be performed according to the frequency response curve of the acoustic output device provided in the present disclosure. Further, in the present disclosure, the spatial arrangement of one or more components of the air conduction acoustic assembly and the bone conduction acoustic assembly may be not limited. For example, the spatial arrangement of the bone conduction acoustic assembly and the air conduction acoustic assembly may vary according to practical requirements. By way of exemplary illustration, a position, an orientation (e.g., an orientation of the front side of the housing), etc., of the diaphragm in the air conduction acoustic assembly in the housing may be varied according to practical requirements, which is not limited here.
In some embodiments, the magnetic circuit assembly 1520 may include a magnetic conductor (e.g., a magnetic conduction cover 1521) and a magnet 1522, which cooperate with each other to form a magnetic field. The magnetic conduction cover 1521 may include a bottom plate 1523 and a side plate 1524. The bottom plate 1523 and the side plate 1524 may be integrally connected. In some embodiments, the magnet 1522 may be provided within the side plate 1524 and fixed to the bottom plate 1523. A side of the magnet 1522 away from the bottom plate 1523 may be connected to the central region of the elastic element 1540 via a connector 1525, so that the coil 1530 can extend into the magnetic gap 1550 between the magnet 1522 and the magnetic conduction cover 1521. It should be noted that the magnet 1522 may be a magnet group formed by multiple sub-magnets. In addition, a side of the magnet 1522 away from the bottom plate 1523 may be provided with a magnetic conduction plate (not labeled in the figure).
In some embodiments, a peripheral region of the elastic element 1540 is connected to the housing 1601, thereby suspending the magnetic circuit assembly 1520 within the housing 1601. The communication hole 1606 may be located at a side of the spring sheet 1540 away from the skin contact region.
In some embodiments, the coil support 1510 may include a main part 1511 and a first support part 1512. One end of the first support part 1512 is connected to the main part 1511. The coil 1530 is connected to the other end of the first support part 1512 away from the main part 1511, and the communication hole 1606 may be located at a connection position between the main part 1511 and the first support part 1512. In some embodiments, the main part 1511 may be connected to the peripheral region of the spring sheet 1540. The main part 1511 and the spring sheet 1540 may form an integral structure, for example, form the integral structure based on a metal insert injection molding process.
In some embodiments, the coil support 1510 may also include a second support part 1513 connected to the main part 1511. The second support part 1513 surrounds the first support part 1512 and extends laterally toward the main part 1511 in the same direction as the first support part 1512. The second support part 1513 and the main part 1511 may be connected to the housing 1601 together to increase a connection strength between the coil support 1510 and the housing 1601. It should be noted that the first support part 1512 and/or the second support part 1513 may be a continuous and complete structure in a peripheral direction of the coil support 1510 to increase the structural strength of the coil support 1510, or may be a partially discontinuous structure to avoid other structural members.
Based on the above descriptions and referring to
In some embodiments, as shown in
In some embodiments, as shown in
Referring to
Referring to
In some embodiments, the acoustic output device may include a communication channel 1560 communicating the first chamber 1610 with the second chamber 1620. The communication channel 1560 may destroy the high-pressure regions in the first chamber 1610 and the second chamber 1620, thereby increasing the peak resonance frequency of the resonance peak and improving the sound quality and leakage of the acoustic output device.
Referring to
In some embodiments, the hole array 15036 may also cooperate with the tuning hole 1605 such that the air conduction sound wave output to the outside of the acoustic output device via the sound outlet 1602 is shifted toward high frequency.
A frequency response curve of the air conduction sound wave output to the outside of the acoustic output device via the sound outlet may have a resonance peak, and a peak resonance frequency of the resonance peak may be greater than or equal to 2 kHz. In some embodiments, the peak resonance frequency of the resonance peak when the communication channel is in an open state is shifted to high frequency compared to the peak resonance frequency of the resonance peak when the communication channel is in a closed state, and an offset may be greater than or equal to 500 Hz. Preferably, the offset may be greater than or equal to 1 kHz. In some embodiments, as the peak resonance frequency of the resonance peak is shifted toward high frequency, the sound leakage in the mid-low frequency range of the acoustic output device is gradually reduced. For example,
Referring to
Referring to
In order to further describe the effects of the sound guiding channel, the pressure relief hole, and the tuning channel in the acoustic output device, only the scenario when the user wears the acoustic output device shown in
As shown in
As shown in
As shown in
As shown in
As shown in
Referring to
Referring to
As shown in
Referring to
The basic concepts have been described above, apparently, in detail, as will be described above, and do not constitute limitations of the disclosure. Although there is no clear explanation here, those skilled in the art may make various modifications, improvements, and modifications of the present disclosure. This type of modification, improvement, and corrections are recommended in the present disclosure, so the modification, improvement, and the amendment remain in the spirit and scope of the exemplary embodiment of the present disclosure.
At the same time, the present disclosure uses specific words to describe the embodiments of the present disclosure. As “one embodiment,” “an embodiment,” and/or “some embodiments” mean a certain feature, structure, or characteristic of at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to “an embodiment” or “one embodiment” or “an alternative embodiment” in various parts of the present disclosure are not necessarily all referring to the same embodiment. Further, certain features, structures, or features of one or more embodiments of the present disclosure may be combined.
Further, it can be understood by those skilled in the art that aspects of the present disclosure can be illustrated and described by a number of patentable categories or situations, including any new and useful combination of processes, machines, products, or substances, or any new and useful improvement thereof. Accordingly, aspects of the present disclosure may be performed entirely by hardware, may be performed entirely by software (including firmware, resident software, microcode, etc.), or may be performed by a combination of hardware and software. Any of the above hardware or software may be referred to as a “data block,” “module,” “engine,” “unit,” “component,” or “system.” In addition, aspects of the present disclosure may be represented as a computer product located in one or more computer-readable media that includes computer-readable program code.
The computer storage medium may contain a propagated data signal with a computer program encoded within it, for example on a baseband or as part of a carrier wave. The propagation signal may have a variety of manifestations, including an electromagnetic form, an optical form, or the like, or a suitable combination. The computer storage medium may be any computer-readable medium other than a computer-readable storage medium that may be connected to an instruction execution system, device, or apparatus to enable communication, propagation, or transmission of a program for use. The program code located on the computer storage medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, RF, or similar medium, or any combination of the foregoing.
Moreover, unless the claims are clearly stated, the sequence of the present disclosure, the use of the digital letters, or the use of other names is not configured to define the order of the present disclosure processes and methods. Although some examples of the disclosure currently considered useful in the present disclosure are discussed in the above disclosure, it should be understood that the details will only be described, and the appended claims are not limited to the disclosure embodiments. The requirements are designed to cover all modifications and equivalents combined with the substance and range of the present disclosure. For example, although the implementation of various components described above may be embodied in a hardware device, it may also be implemented as a software only scheme, e.g., an installation on an existing server or mobile device.
Similarly, it should be noted that in order to simplify the expression disclosed in the present disclosure and help the understanding of one or more embodiments, in the previous description of the embodiments of the present disclosure, a variety of features are sometimes combined into one embodiment, drawings or description thereof. However, this disclosure method does not mean that the characteristics required by the object of the present disclosure are more than the characteristics mentioned in the claims. Rather, claimed subject matter may lie in less than all features of a single foregoing disclosed embodiment.
In some embodiments, numbers expressing quantities of ingredients, properties, and so forth, configured to describe and claim certain embodiments of the application are to be understood as being modified in some instances by the term “about,” “approximate,” or “substantially.” Unless otherwise stated, “approximately,” “approximately” or “substantially” indicates that the number is allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and the approximate values may be changed according to characteristics required by individual embodiments. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Although the numerical domains and parameters used in the present disclosure are configured to confirm its range breadth, in the specific embodiment, the settings of such values are as accurately as possible within the feasible range.
For each patent, patent application, patent application publication and other materials referenced by the present disclosure, such as articles, books, instructions, publications, documentation, etc., hereby incorporated herein by reference. Except for the application history documents that are inconsistent with or conflict with the contents of the present disclosure, and the documents that limit the widest range of claims in the present disclosure (currently or later attached to the present disclosure). It should be noted that if a description, definition, and/or terms in the subsequent material of the present disclosure are inconsistent or conflicted with the content described in the present disclosure, the use of description, definition, and/or terms in this manual shall prevail.
Finally, it should be understood that the embodiments described herein are only configured to illustrate the principles of the embodiments of the present disclosure. Other deformations may also belong to the scope of the present disclosure. Thus, as an example, not limited, the alternative configuration of the present disclosure embodiment may be consistent with the teachings of the present disclosure. Accordingly, the embodiments of the present disclosure are not limited to the embodiments of the present disclosure clearly described and described.
Number | Date | Country | Kind |
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202110383452.2 | Apr 2021 | CN | national |
This application is a continuation of International Patent Application No. PCT/CN2021/095546, filed on May 24, 2021, which claims priority of Chinese Patent Application No. 202110383452.2, filed on Apr. 9, 2021, the contents of each of which are hereby incorporated by reference.
Number | Date | Country | |
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Parent | PCT/CN2021/095546 | May 2021 | US |
Child | 18313354 | US |