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Apparatus and methods for combining audio compression and feedback cancellation in a hearing aid

  • US 6,434,246 B1
  • Filed: 10/02/1998
  • Issued: 08/13/2002
  • Est. Priority Date: 10/10/1995
  • Status: Expired due to Term
First Claim
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1. A hearing aid comprising:

  • a microphone for converting sound into an audio signal;

    feedback cancellation means including means for estimating a physical feedback signal of the hearing aid, and means for modelling a signal processing feedback signal to compensate for the estimated physical feedback signal;

    subtraction means, connected to the output of the microphone and the output of the feedback cancellation means, for subtracting the signal processing feedback signal from the audio signal to form a compensated audio signal;

    hearing aid processing means, connected to the output of the subtractor, for processing the compensated audio signal; and

    speaker means, connected to the output of the hearing aid processing means, for converting the processed compensated audio signal into a sound signal;

    wherein said feedback cancellation means forms a feedback path from the output of the hearing aid processing means to the input of the subtracting means; and

    wherein said hearing aid processing means includes compression means for performing audio compression.

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