This document relates to hearing assistance devices and more particularly method and apparatus for a wireless beacon system to identify acoustic environment for hearing assistance devices.
Hearing assistance devices, such as hearing aids, can provide adjustable operational modes or characteristics that improve the performance of the hearing assistance device for a specific person or in a specific environment. Some of the operational characteristics include, but are not limited to volume control, tone control, directionality, and selective signal input. These and other operational characteristics can be programmed into a hearing aid. Advanced hearing assistance devices, such as digital hearing aids, may be programmed to change from one operational mode or characteristic to another depending on algorithms operating on the device. As the person wearing a hearing assistance device moves between different acoustic environments, it may be advantageous to change the operational modes or characteristics of the hearing assistance device to adjust the device to particular acoustic environments. Some devices may possess signal processing adapted to classify the acoustic environments in which the hearing assistance device operates. However, such signal processing may require a relatively large amount of signal processing power, be prone to error, and may not yield sufficient improvement in cases when processing power is available. Certain environments may be more difficult to classify than others and can result in misclassification of the environment or frequent switching of the detected environment, thereby resulting in reduced hearing benefits of the hearing assistance device. One problematic environment is that of a vehicle, such as an automobile. Wearers of digital hearing aids in moving vehicles are exposed to a variety of sounds coming from the vehicle, open windows, fans, and sounds from outside of the vehicle. Users may experience frequent mode switching from adaptive devices as they attempt to adjust rapidly to changing acoustic environmental inputs.
There is a need in the art for an improved system for determining acoustic environments in hearing assistance devices.
This document provides methods and apparatus to provide environment awareness in hearing assistance devices. In one embodiment, a wireless beacon is provided acoustic environment information, the beacon including a memory to store one more acoustic environment codes identifying one or more acoustic environments, a wireless transmitter coupled to the memory and an antenna coupled to the wireless transceiver to transmit the one or more acoustic environment codes to a hearing assistance device.
In one embodiment, a beacon device is provided for wirelessly communicating with a hearing assistance device. The beacon device includes a sensor to sense a signal related to determination of an acoustic environment, a memory to store information relating to the signal, a processor in communication with the memory and the sensor, the processor adapted to process the information, a wireless transmitter in communication with the memory and an antenna coupled to the wireless transceiver to transmit information to the hearing assistance device.
In one embodiment, a method is provided for controlling operation of a hearing assistance device. The method includes storing one or more acoustic environment codes in a beacon device, the one or more acoustic environment codes identifying one or more acoustic environments, transmitting an acoustic environment code of the one or more acoustic environment codes to a hearing assistance device and adjusting an operational mode of the hearing assistance device based on the acoustic environment code.
This Summary is an overview of some of the teachings of the present application and is not intended to be an exclusive or exhaustive treatment of the present subject matter. Further details about the present subject matter are found in the detailed description and the appended claims. The scope of the present invention is defined by the appended claims and their legal equivalents.
The following detailed description of the present invention refers to subject matter in the accompanying drawings which show, by way of illustration, specific aspects and embodiments in which the present subject matter may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present subject matter. References to “an”, “one”, or “various” embodiments in this disclosure are not necessarily to the same embodiment, and such references contemplate more than one embodiment. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope is defined only by the appended claims, along with the full scope of legal equivalents to which such claims are entitled.
In various embodiments, the beacon device includes one or more sensors. In one embodiment, the sensor is an accelerometer. In one embodiment, the sensor is a micro-electro-mechanical system (MEMS) accelerometer. In one embodiment, the sensor is a magnetic sensor. In one embodiment, the sensor is a giant magnetorestrictive (GMR) sensor. In one embodiment the sensor is an anisotropic magnetorestrictive (AMR) sensor. In one embodiment the sensor is a microphone. In various embodiments, a combination of sensors are employed, including, but not limited to those stated in this disclosure. In various embodiments signal processing circuits capable of processing the sensor outputs are included. In various embodiments, a processor is included which processes signals from the one or more sensors. In various embodiments, the processor is adapted to determine the acoustic environment based on data from at least one of the one or more sensors. In such embodiments, environment information is sent wirelessly to one or more hearing assistance devices. In various embodiments, the beacon device sends the sensor data wirelessly. In such embodiments, one or more hearing assistance devices can receive the data and process it to identify an acoustic environment. In various embodiments, the beacon may act as a remote sensor to the one or more hearing assistance devices. The information from the beacon can be used exclusively, selectively, or in combination with audio information from the hearing assistance device to determine an acoustic environment. Other sensors and applications are possible without departing from the scope of the present subject matter.
In various embodiments, memory 112 stores one or more acoustic environment codes that identify one or more particular acoustic environments. Transmitter 114 is configured to transmit the one or more acoustic environment codes stored in memory 112 at uniform intervals. In one embodiment, the transmitter 114 is adapted to detect the presence of a hearing assistance device and initiate transmission of one or more acoustic environment codes stored in memory 112. In various embodiments, memory 112 includes non-volatile flash memory. In various embodiments, memory 112 includes a DRAM (Dynamic Random Access Memory). In various embodiments, memory 112 includes an SRAM (Static Random Access Memory). In various embodiments, memory 112 stores sensor signal information from one or more sensors. In various embodiments, such sensor signal information is telemetered using transmitter 114. In various embodiments, such sensor signal information is processed before it is transmitted. Other techniques and apparatus may be employed to provide the memory. For example, in one embodiment, the code is hardwired to provide the memory used by transmitter 114.
In various embodiments, beacon device 110 is attached to devices to assist the hearing assistance device in determining the appropriate processing required by the hearing assistance device. For example, a beacon device 110 could be attached to a user's television, and the hearing assistance device would automatically switch to a “television” mode when the television is powered on (thus activating the TV beacon). In various embodiments, the hearing assistance device switches to a predetermined mode when it senses various coded beacon devices in range. In various embodiments, beacon devices could be attached to noisy consumer devices such as a vacuum cleaner, which can change noise reduction more accurately and quickly then when compared to having to detect such consumer devices solely based on their acoustic signature. In various embodiments, beacon devices could be configured to automatically terminate transmission of acoustic environment codes when the consumer device (such as a television, vacuum cleaner, etc.) is turned off.
In various embodiments, such as in behind-the-ear devices, hearing assistance electronics 205 is in communications with a speaker (or receiver, as is used commonly in hearing aids) in communication with electronics in first housing 221. In such embodiments, a hollow sound tube is used to transmit sound from the receiver in the behind-the-ear or over-the-ear device to an earpiece 228 in the ear. Thus, in the BTE application, BTE housing 221 is connected to a sound tube 223 to provide sound from the receiver to a standard or custom earpiece 228. In such BTE designs, no receiver is found in the earpiece 228.
In various embodiments, beacon device 110 transmits an acoustic environment code identifying an acoustic environment. In various embodiments, the wireless receiver 206 in the hearing assistance device 210 receives the acoustic environment codes transmitted by the beacon device 110. In various embodiments, upon receiving the acoustic environment code, the wireless receiver 206 sends the received acoustic environment code to hearing assistance electronics 205. In various embodiments, sensor information is transmitted by the beacon device 110 to hearing assistance device 210 and the information is processed by the hearing assistance device. In various embodiments, the processing includes environment determination. In various embodiments, the information transmitted includes sensor based information. In various embodiments, the information transmitted includes statistical information associated with sensed information.
In various embodiments the hearing assistance electronics 205 can be programmed to perform a variety of functions depending on a received code. Some examples include, but are not limited to, configuring the operational mode of the at least one microphone, adjusting operational parameters, adjusting operational modes, and/or combinations of one or more of the foregoing options. In various embodiments, the operating mode of the microphone is set to directional mode based on the received acoustic environment code that identifies a particular acoustic environment (eg., acoustic environment where the user is listening to fixed speaker in a closed room), if the wearer would benefit from a directional mode setting for a better quality of hearing. In various embodiments, the operating mode of the microphone is set to an omni-directional mode based on the received acoustic environment code. For example, if the user is listening to natural sounds in an open field, the microphone setting can be set to omni-directional mode for providing further clarity of the acoustic waves received by the hearing assistance device 210. In various embodiments, where there is more than one microphone, the operating mode of a first microphone can be set to a directional mode and the operating mode of a second microphone can be set to an omni-directional mode based on the acoustic environment code received from the beacon device 110.
In various embodiments, the first housing 221 is a housing adapted to be worn on the ear of a user, such as, an on-the-ear (OTE) housing or a behind-the-ear (BTE) housing. In various embodiments, the second housing 228 includes an earmold. In various embodiments, the second housing 228 includes an in-the-ear (ITE) housing. In various embodiments, the second housing 228 includes an in-the-canal (ITC) housing. In various embodiments, the second housing 228 includes a completely-in-the-canal (CIC) housing. In various embodiments the second housing 228 includes an earbud. In various embodiments, the receiver 207 is placed in the ear canal of the wearer using a small nonocclusive housing. Other earpieces are possible without departing from the scope of the present subject matter.
In the illustrated embodiment of
In various embodiments, each of the acoustic environment codes stored in memory 112 is indicative of various different acoustic environments. In various embodiments, the transmitted wireless signals include data indicative of the acoustic environment of the location of beacon device 110. In various embodiments, the acoustic environments include, but are not limited to, the inside of a car, an empty room, a lecture hall, a room with furniture, open spaces such as in a country side, a sidewalk of a typical city street, inside a plane, a factory work environment, etc. In various embodiments, the acoustic environment codes are stored in register locations within memory 112. In some embodiments, memory 112 includes non-volatile flash memory.
At block 630, method 600 includes receiving the one or more environment codes at a hearing assistance device. In various embodiments, receiving the one or more environment codes at a hearing assistance device comprises receiving an acoustic environment code when the hearing assistance device enters the particular acoustic environment identified by the acoustic environment code. In various embodiments, receiving the first acoustic environment code comprises receiving the first acoustic environment code when a user having the hearing assistance device enters an automobile, a plane, a railway car or a ship. In various embodiments, acoustic environments can include inside of a car, an empty room, a lecture hall, a room with furniture, open spaces such as in a countryside, a sidewalk of a typical city street, inside a plane, a factory work environment, in a room during vacuuming, watching a television, hearing the radio etc.
At block 640, method 600 includes adjusting an operational mode of the hearing assistance device based on the received environment code. In various embodiments, adjusting the operational mode of the hearing assistance device comprises switching between a first microphone and a second microphone. In various embodiments, switching between a first microphone and a second microphone comprises switching between a directional microphone and an omni-directional microphone.
In various embodiments, information is telemetered relating to signals sensed by the one or more sensors on the wireless beacon device. In such designs the information telemetered includes, but is not limited to, sensed signals, and/or statistical information about the sensed signals. Hearing assistance devices receiving such information are programmed to process the received signals to determine an environmental status. In such embodiments, the received information may be used by the hearing assistance system to determine the acoustic environment and/or to at least partially control operation of the hearing assistance device for better listening by the wearer.
The present subject matter includes hearing assistance devices, including, but not limited to, cochlear implant type hearing devices, hearing aids, such as behind-the-ear (BTE), in-the-ear (ITE), in-the-canal (ITC), or completely-in-the-canal (CIC) type hearing aids. It is understood that behind-the-ear type hearing aids may include devices that reside substantially behind the ear or over the ear. Such devices may include hearing aids with receivers associated with the electronics portion of the behind-the-ear device, or hearing aids of the type having receivers in-the-canal. It is understood that other hearing assistance devices not expressly stated herein may fall within the scope of the present subject matter.
This application is intended to cover adaptations and variations of the present subject matter. It is to be understood that the above description is intended to be illustrative, and not restrictive. The scope of the present subject matter should be determined with reference to the appended claims, along with the full scope of legal equivalents to which the claims are entitled.
This application claims the benefit under 35 U.S.C. 119(e) to U.S. Provisional Patent Application Ser. No. 61/029,564 filed Feb. 19, 2008 which is incorporated herein by reference in its entirety.
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