The present invention relates generally to the field of microphones, and more particularly to a microphone including a dual connector.
Microphones, such as directional microphones, are widely used in various applications such as professional or home music recording, news gathering, sporting events, outdoor film recording, and content creation. Once audio is captured, it can be output to one or more devices via a wireless or wired connection.
Wired microphones typically include an audio interface for outputting the audio to another device. For example, conventional microphones may include an optical interface, a universal serial bus (USB), a three-pin external line return (XLR), a tip and sleeve (TS) connector, a tip, ring, and sleeve (TRS) connector, and the like.
To accommodate for the variety of audio connectors in the market, certain microphones may include a plurality of analog and/or digital interfaces. However, wired microphones that utilize an analog input often rely on the host device to enhance the sound and performance of the audio.
Conventional microphones with a digital or USB connection typically include a single analog-to-digital converter (ADC) for one or more input channels. This often results in a non-simultaneous sampling on individual channels and ultimately in degradation of performance. In addition, conventional microphones often require sorting through dual recording in post-production to find unclipped tracks. Typically, a USB or digital microphone with have a limited usable dynamic range dictated by the the fixed or variable gain applied to the microphone, which is fed into a single or dual analogue to digital converter at 24 bits or less. In the event that the audio signal exceeds the maximum range allowable by the Analogue to digital converter, the signal is clipped and the quality is therefore degraded.
Therefore, there is a need for a microphone that is configured to route audio signals to each available interface for recording of low distortion, high dynamic range audio that exceeds that of a single analogue to digital converter.
The present invention relates generally to the field of microphones, and more particularly to a microphone having a dual connector including an analog connector and a digital port. Advantageously, the microphone may be configured to connect with a variety of host devices and may facilitate functioning as a USB-C microphone via the digital port for producing an improved audio signal recording.
In one aspect, the microphone may include an insert having an XLR connector. The insert may include a cutout configured to receive a Type-C USB port. In particular, the cutout may be arranged such that the Type-C USB port is positioned directly adjacent or vertically between one or more pins of an analog connector. A grounding bracket may be configured to couple to one or more pins of the analog connector. The grounding bracket may be secured to the insert via a grounding screw.
Further, the microphone may include a printed circuit board (PCB) secured between the analog connector and the digital connector. The PCB may be a double-sided printed circuit board having a first surface and a second surface. PCB may include switching circuitry for selectively powering the microphone circuitry or capsule. Further, PCB may include processing circuitry for generating an output signal.
Moreover, the processing circuitry may include a microprocessor for audio signal processing to enhance the sound and performance of the microphone when connected to a host device via the digital port. Specifically, processing circuitry may be configured to split the audio signal into two or more processed signals. Each processed signal may correspond to a fixed decibel level offset of audio received by a capsule of the microphone. For example, the audio may be split into four processed signals, such that the fixed decibel level offset of each processed signal is between 0 dB and about 60 dB.
In another aspect, the microphone may be configured to monitor samples of the audio according to a sampling interval or frequency. In particular, the processing circuitry may be configured to monitor each processed signal to detect a highest gain processed signal with the best available signal to noise ratio. Further, the processing circuitry may be configured to selectively switch between two or more analog-to-digital converters (ADC) based on the ideal gain processed signal, corresponding to the signal with the highest signal-to-noise ratio without any overloading or clipping present.
By monitoring the lowest gain signal, the processing circuitry may facilitate monitoring the signal with a goal of switching to a “highest” gain ADC that has not clipped, for each given sampled section of audio, such as sampling interval of 8 samples. In other words, by having a higher gain level, the processing circuitry is configured to determine the signal furthest from the noise floor, therefore providing an optimal signal-to-noise ratio available for that sample of audio. The processing circuitry may then then stitch or combine the samples together, the signal is always at an ideal signal-to-noise ratio. For example, a whisper input would result in the highest gain signal being chosen, therefore matching the input signal, whereas a jet engine would receive the lowest gain signal, so it did not clip.
More specifically, processing circuitry may be configured to select an ADC to produce a digital signal of a processed audio sample. To select the ADC, the processing circuitry may monitor the lowest gain processed signal because it may have the most signal headroom, in order to predict the signal with the highest gain that is free from clipping or distortion i.e., the highest signal-to-noise ratio. The processing circuitry may then combine the digital signals produced by switching seamlessly between the digital signal produced from the ADC for each sample of audio, selecting the ideal ADC for each sample of audio for the reconstruction. Further, processing circuitry may be configured to apply the appropriate digital gain offset to account for the analog gain difference between each ADC input.
Once digital signals from corresponding ADCs are combined, the microphone may be configured to generate an output signal. The output signal may be a 32-bit floating-point recording or audio stream that facilitates recovering clipped recordings with no distortion and capturing a large dynamic range to, for example, reduce the need for gain adjustments required and avoid sorting through dual-recordings in post-production.
In yet another aspect, the disclosure may relate to a retrofit kit for a microphone or other audio device. Retrofit kit may include an XLR connector a Type-C USB port. USB port may be positioned directly adjacent or vertically between one or more pins of the XLR connector. Further, a grounding bracket may be configured to couple with a pin of XLR port and be secured via a grounding screw.
As disclosed above, the retrofit kit may include a PCB secured between the XLR connector and Type-C USB port. PCB may include switching circuitry for selectively powering a capsule or other electronics and processing circuitry for generating an output signal. Advantageously, retrofit kit may facilitate updating a microphone or other audio device to function as a USB-C microphone for producing an improved audio signal recording, such as a 32-bit floating-point recording.
While the invention is susceptible to various modifications and alternative forms, specific exemplary embodiments thereof have been shown by way of example in the drawings and have herein been described in detail. It should be understood, however, that there is no intent to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
Embodiments are illustrated by way of example and not limitation in the figures in the accompanying drawings, in which like references indicate similar elements and in which:
The present invention relates generally to the field of microphone connectors, and more particularly to a dual connector including an analog connector and a digital port. The digital port may be positioned directly adjacent or within the analog connector. For example, a Type-C USB port may positioned directly above one or more pins of an XLR connector or between one or more pins of the XLR connector. Advantageously, the microphone may be configured to connect with a variety of host devices and may facilitate functioning as a USB-C microphone via the digital port for producing an enhanced output signal, such as a 32-bit floating-point recordin0Turning now to the drawings wherein like numerals represent like components,
Capsule 102 of microphone 100 may include an arrangement of field effect transistors to, for example, achieve low noise. In addition, capsule 102 may be electrically connect to one or more audio interfaces via PCB 104, as detailed below.
Further, capsule 102 may be configured to convert sound waves into electrical signals. Although not shown, capsule 102 may include a flexible diaphragm and an insulated electrode referred to as a backplate. The diaphragm and backplate form the two plates of a capacitor, which, in the absence of a sound wave, will have a very small but definite capacitance. When a sound wave displaces the diaphragm, the capacitance will either be increased above or reduced below a resting value; depending upon whether the sound wave pushes the diaphragm toward the backplate or causes it to bow out away from the backplate.
Housing 106 may be cylindrical in shape and may further include a downwardly extending threaded portion 107, which may be configured to mate with corresponding threads of, for example, a stand, tripod, suspension mount, and the like. Further, housing 106 may include an opening 108 configured to receive an insert 109 including one or more connectors, as detailed below. A radius of insert 109 may range between about five millimeters and about fifteen millimeters, and preferably between about seven millimeters and about nine millimeters. As illustrated in
As shown in
Digital port 114 is preferably a Type-C USB port 118 and analog connector is preferably a three-pin external line return (XLR) connector 120. As shown in
Insert 109 may further include soldering cups 124a, 124b, and 124c. Soldering cups 124a, 124b, and 124c may be portions of contact pins 122a, 122b, and 122c respectively, projecting from a rear surface of the insert 109. Soldering cups 124a, 124b, and 124c may be configured to electrically couple with PCB 104, as detailed below.
As shown in the configuration of
As shown in the configuration of
Further, insert 109 may include a cutout 140. While cutout 140 is shown in
As shown, PCB 104 may be secured between Type-C USB port 118 and analog connector 120. More specifically, PCB 104 may be a double surface mounted flexible printed circuit board. PCB 104 may include a first surface 142 and an opposite second surface 144. Both surfaces 142, 144 may include electronic components mounted thereon, as detailed below. While in the present disclosure, electronic components of each surface are different, it is contemplated that electronic components of first surface 142 may be the same as electronic components of second surface 144.
First surface 142 may include USB Type-C port 118 mounted thereon. USB Type-C port 118 may enable a connection with a USB device in multiple cable orientations. Port 118 may be a multi-mode port that can support a number of different protocols. Pins included in USB Type-C port 118 may include SuperSpeed pins, USB 2.0 pins, Auxiliary pins, Power pins, Ground pins, and Configuration channel (CC) pins. SuperSpeed signals may be used to implement USB 3.1 signaling, while USB 2.0 pins may be used to implement USB 2.0 functionality. Auxiliary Signal Pins may be used for sideband signaling. CC pins may be used to detect connections, determine plug orientation, and may facilitate baseband communications. Power pins may be configured to deliver power for standard USB operation as well as system operation and battery charging or supply power to an active cable. Ground pin may include a ground return current path.
As shown in
As mentioned above, housing 106 may include an opening 108 configured to receive PCB 104 and insert 109. As further illustrated in
As shown in the configuration of
Alternatively, as shown in the configuration of
It is further contemplated that a kit may be provided for retrofitting certain above disclosed features and components to other microphones or audio equipment. For instances, other microphones or audio equipment may lack one or more interfaces, a PCB, and/or other features disclosed herein. For example, the kit may include insert 109, digital port 114, analog connector 116, and grounding bracket 126. In one aspect, the kit may include Type-C USB port 118, XLR connector 120, and PCB 104. It is further contemplated that the kit may include housing 106 or another casing configured to mount and secure to a microphone or audio device. The kit also may include all necessary wiring, mounts, cables, fasteners, and other hardware required to install the components of the kit.
As illustrated, first configuration 204 correspond to connection of microphone 100 to a host device via XLR connector 120. In this configuration, capsule 102 of microphone 100 may be powered by a phantom supply 208. For example, capsule 102 may be powered by a standard 48 volt DC power that is provided from the host device to microphone 100 as a biasing voltage 210. It is further contemplated that a bias voltage of the actual capsule itself could be anywhere from 3-5 volts for an electret capsule to 200 volts for a measurement microphone for the capsule bias voltage, depending on the type of capsule. As shown, circuit 200 is then configured to distribute the power supply to other components of microphone 100.
Upon detecting that microphone 100 is connected to a host device via digital port 114, such as Type-C USB port 118, the state of circuit 200 may be changed from first configuration 204, e.g., normally closed, to second configuration 206, e.g., normally open. In this configuration, a power conditioner 212 may be configured to generate a separate biasing voltage for applying to the capsule 102 and other components of microphone 100, as detailed below.
As further shown in
If at decision step 404, the connection is not through Type-C USB port 118, in step 406, capsule 102 of microphone 100 may obtain power from the host device via analog connector 120, such as XLR connector 116. For instance, a standard 48 volt DC power may be generated and applied to capsule 102. In step 408, capsule 102 may be configured to receive audio and, in step 410, the audio may be routed directly to XLR connector 116 for output.
If at decision step 404, the connection is through Type-C USB port 118, in step 412, microphone 100 may obtain power from a host device. In step 413, a separate biasing voltage may be generated and applied to capsule 102. In step 414, capsule 102 is configured to receive audio. In step 416, the audio is routed to processing circuitry 300 to enhance the sound and performance of the audio. In particular, processing circuitry 300 may be configured to split the audio signal into two or more processed signals, each processed signal corresponding to a fixed decibel (dB) level offset of the audio signal. For example, the audio signal may be split into four audio signals based on a codec having four channels available per input audio. Further, each processed signal offset according to a fixed decibel level ranging between zero decibels and about sixty decibels.
In step 418, microphone 100 may be configured to simultaneously monitor each processed signal to detect the optimal gain signal. The monitoring may be according to a predetermined sampling interval, such as every eight samples. The term sampling interval may refer to the number of samples in each interval used to determine the optimal gain signal available, corresponding to the signal with the highest signal-to-noise ratio, being the signal with the highest gain without distortion or clipping.
In step 420, for each sample of audio, microphone 100 may be configured to seamlessly and selectively switch between two or more ADC converters. More specifically, microphone 100 may select an ADC from the two or more ADC converters for producing a digital signal based on the optimal gain processed signal monitored at a predetermined sampling interval. The highest gain processed signal may be chosen because it has the best signal-to-noise ratio.
In step 422, microphone 100 may be configured to combine digital signals produced from the two or more ADCs to produce an output signal. Output signal may be a 32-bit floating point audio stream. A 32-bit float recording may facilitate recovering clipped recordings over 0 decibels relative to full scale with zero distortion. Further, the output 32-bit float recording signal may be configured to capture dynamic ranges of up to 1528 dB. This large dynamic range may reduce the requirement for gain adjustments in real time and avoid sorting through dual-recordings in post-production to find unclipped tracks. In step 424, the 32-bit floating point audio stream may be routed to a digital port, such as a Type-C USB port 114.
Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described in the application are to be taken as examples of embodiments. Components may be substituted for those illustrated and described in the application, parts and processes may be reversed, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described in the application without departing from the spirit and scope of the invention as described in the following claims.
Number | Name | Date | Kind |
---|---|---|---|
5404315 | Nakano | Apr 1995 | A |
7104844 | Akino | Sep 2006 | B2 |
8744097 | Nakazawa | Jun 2014 | B2 |
20080144875 | Akino | Jun 2008 | A1 |
20100061559 | Wu | Mar 2010 | A1 |
20110263270 | Roy | Oct 2011 | A1 |
20170033754 | Perrott | Feb 2017 | A1 |
20210160611 | Balgemann | May 2021 | A1 |
20220272452 | Grosz | Aug 2022 | A1 |
20220272473 | Shumard | Aug 2022 | A1 |
Number | Date | Country |
---|---|---|
201278577 | Jul 2009 | CN |
215344981 | Dec 2021 | CN |
3745737 | Dec 2020 | EP |
Entry |
---|
Richbourg, Smythe; Maono AU-HD300T Pro Mic System Review; The Gadgeteer; Jan. 3, 2022. |
Heinzman, Andrew; Samson Q9U Broadcast Mic Review: An Easy and Affordable Mic With USB-C and XLR; Review Geek; Apr. 5, 2021. |
Using Multiple USB Microphones on the Same Computer; Cleanfeed. |
Audio-Technica AT2005USB Cardioid Dynamic USB/XLR Microphone; soundpro.com. |
Shure MV7 USB Podcast Microphone for Podcasting, Recording, Live Streaming & Gaming, Built-In Headphone Output, All Metal USB/XLR Dynamic Mic, Voice-Isolating Technology, Teamspeak Certified—Black; ubuy.com. |
Number | Date | Country | |
---|---|---|---|
20240147104 A1 | May 2024 | US |