Active sound absorber

Details Active sound absorber Active sound absorber

1991-11-19

1993-11-30

Ng, Jin F.

Electrical audio signal processing systems and devices

Hearing protectors, electrical

381 71, 381 686, H04R 2500

Patent

active

052673219

ABSTRACT:
The Active Sound Absorber of the invention is based on an electroacoustical transceiver defined as a bilateral electroacoustical transducer acting as both a diaphragm actuator and motion sensor, and an associated mutual inductance discriminator, in a electroacoustical positive feedback system. Selected embodiment of such a system is an unvented hearing aid where the Active Sound Absorber combats the occlusion effect.

REFERENCES:
patent: 4149612 (1979-04-01), Bachorr
patent: 4325458 (1982-04-01), Bachorr
patent: 4325461 (1982-04-01), Bachorr
patent: 4609784 (1986-09-01), Miller
patent: 4985925 (1991-01-01), Langberg et al.
patent: 5031221 (1991-07-01), Yokoyama

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