Systems for feedback cancellation in an audio interface garment

Details Systems for feedback cancellation in an audio interface garment Systems for feedback cancellation in an audio interface garment

1995-02-08

1997-09-02

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Counterwave generation control path

379390, 381 66, 381 83, 381 93, G10K 1116, H04B 1500, H04R 2700

Patent

active

056640196

ABSTRACT:
An audio interface garment includes systems for attenuating the influence of sound waves generated by audio output devices on output signals from a plurality of input devices an. In one embodiment, input signals which are applied to the audio output devices are combined by a mixer to form a mixed audio signal. A plurality of Widrow-Hoff least mean square adaptive filters each form a corresponding filtered signal based upon the mixed audio signal and the output signal from a corresponding one of the input devices. A plurality of processed signals are formed by differencing each filtered signal from the corresponding output signal. The weight values of the adaptive filters are modified according to the least mean square method. The processed signals provide signals in which the first sound waves are attenuated.

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Widrow, B & Stearns, SD, "Adaptive Signal Processing", pp. 2-43 and 97-187.

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