DETECTION OF WHISTLING IN AN AUDIO SYSTEM
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Accused Products
Abstract
A method for detecting whistling in an audio system includes determining an average frequency of an input signal of the audio system, sampling the input signal in consecutive blocks of at least one sample, wherein the average frequency is determined blockwise, and determining whether feedback related whistling is present in the input signal of the audio system by evaluating a stability of the average frequency, wherein the evaluation of the stability of the average frequency comprises: determining a difference of two values of the determined average frequency for two blocks, and comparing the determined difference to a first threshold value.
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Citations
41 Claims
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1-19. -19. (canceled)
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20. A method for detecting whistling in an audio system, comprising:
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determining an average frequency of an input signal of the audio system; sampling the input signal in consecutive blocks of at least one sample, wherein the average frequency is determined blockwise; comparing a value of the determined average frequency for one of the blocks with another value of the determined average frequency for another one of the blocks; and determining whether feedback related whistling is present in the input signal of the audio system based at least in part on a result from the act of comparing. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A hearing aid, comprising:
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a microphone for the provision of an input signal; a whistle detector unit that is configured to detect whistling in the hearing aid; and a receiver for the provision of an output sound signal to be presented to a user of the hearing aid; wherein the whistle detector is configured for; determining an average frequency of the input signal of the hearing aid; sampling the input signal in consecutive blocks of at least one sample, wherein the average frequency is determined blockwise; comparing a value of the determined average frequency for one of the blocks with another value of the determined average frequency for another one of the blocks; and determining whether feedback related whistling is present in the input signal of the hearing aid based at least in part on a result from the act of comparing. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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Specification