Hearing aid compensating for acoustic feedback

Details Hearing aid compensating for acoustic feedback Hearing aid compensating for acoustic feedback

1996-10-17

1997-10-21

Le, Huyen D.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 68, 381 71, 381 83, 381 73, H04R 2500, H04B 1500

Patent

active

056804679

ABSTRACT:
A hearing aid with digital, electronic compensation for acoustic feedback includes a microphone, a preamplifier, a digital compensation circuit and output amplifier and a transducer. The digital compensation circuit includes a noise generator for the insertion of noise, and an adjustable, digital filter for the adaptation of the feedback signal. The adaptation takes place using a correlation circuit which includes a digital circuit to carry out a statistical evaluation of the filter coefficients in the correlation circuit, and changes the feedback function in accordance with this evaluation.

REFERENCES:
patent: 4783818 (1988-11-01), Graupe et al.
patent: 4791390 (1988-12-01), Harris et al.
patent: 5016280 (1991-05-01), Engebretson et al.
patent: 5259033 (1993-11-01), Goodings et al.

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