Band-limited adaptive feedback canceller for hearing aids

Details Band-limited adaptive feedback canceller for hearing aids Band-limited adaptive feedback canceller for hearing aids

2007-11-06

2007-11-06

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Hearing aids, electrical

Noise compensation circuit

C381S083000, C381S093000, C381S320000

Reexamination Certificate

active

11089399

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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