Band-limited adaptive feedback canceller for hearing aids
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United States of America Patent
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Nov 6, 2007
Grant Date -
Jul 28, 2005
app pub date -
Mar 23, 2005
filing date -
Sep 30, 1998
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Abstract
An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.
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