Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 21, 2011
Patent Application Number
11935142
Date Filed
November 5, 2007
Patent Primary Examiner
Patent 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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