Hearing assistance devices with echo cancellation
First Claim
1. A hearing assistance device, comprising:
- a housing configured to be worn on or in an ear of a wearer;
a microphone in the housing;
an output from the housing;
a receiver connected to the output;
an adaptive filter in the housing configured to perform acoustic feedback cancellation for the hearing assistance device;
a signal processor in the housing programmed to include feedback cancellation; and
a wireless communication antenna in the housing, a wireless communication receiver in the housing, and a wireless communication transmitter in the housing;
wherein the hearing assistance device is configured to operate in multiple reception modes including a wireless communication mode;
wherein in the wireless communication mode, the microphone is electrically decoupled from the output and a received wireless signal is used as a training signal for the adaptive filter, wherein the signal processor is configured to modify the feedback cancellation by changing an adaptation coefficient of the adaptive filter such that echo cancellation of the wireless signal is performed by the adaptive filter.
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Accused Products
Abstract
According to various embodiment of a method of operating a hearing instrument, an acoustic signal pathway is provided from a microphone through a signal processor to a hearing instrument (HI) receiver in an acoustic mode of operation. An RF transmit signal pathway is provided from the microphone to an RF transmitter, and an RF receive signal pathway is provided from the RF receiver through the signal processor to the HI receiver in an RF mode of operation. An input signal representative of sound detected by the microphone is adaptively filtered. A first adaptation rate is used for the acoustic mode of operation and a second adaptation rate is used for the RF mode of operation. The second adaptation rate is faster than the first adaptation rate.
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Citations
20 Claims
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1. A hearing assistance device, comprising:
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a housing configured to be worn on or in an ear of a wearer; a microphone in the housing; an output from the housing; a receiver connected to the output; an adaptive filter in the housing configured to perform acoustic feedback cancellation for the hearing assistance device; a signal processor in the housing programmed to include feedback cancellation; and a wireless communication antenna in the housing, a wireless communication receiver in the housing, and a wireless communication transmitter in the housing; wherein the hearing assistance device is configured to operate in multiple reception modes including a wireless communication mode; wherein in the wireless communication mode, the microphone is electrically decoupled from the output and a received wireless signal is used as a training signal for the adaptive filter, wherein the signal processor is configured to modify the feedback cancellation by changing an adaptation coefficient of the adaptive filter such that echo cancellation of the wireless signal is performed by the adaptive filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification