Audio signal processing circuit for use in a hearing aid and met

Details Audio signal processing circuit for use in a hearing aid and met Audio signal processing circuit for use in a hearing aid and met

1984-07-23

1987-07-14

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 682, 381104, H04R 2500, H03G 320

Patent

active

046807985

ABSTRACT:
In a hearing aid of the type having an electrical amplifier, wherein the improvement provides an audio signal processing circuit incorporated into the amplifier and including integral computing circuitry for controlling the operation thereof; the processing circuit providing circuitry for receiving an audio frequency electrical signal, circuitry for separating the audio frequency signal into a plurality of frequency bandwidths, circuitry for separately amplifying any audio frequency signal present in each of the bandwidths, circuitry for summing the amplified audio frequency signals from each of the bandwidths to produce a reconstituted signal, and circuitry for controlling amplification including circuitry for sampling any audio frequency signal present in each of the bandwidths and circuitry for determining, in response to the audio frequency signals sampled from all of the bandwidths the amplification level for each bandwidth for the separate amplification.

REFERENCES:
patent: 4187413 (1980-02-01), Moser
patent: 4222393 (1980-09-01), Hocks et al.
patent: 4396806 (1983-08-01), Anderson
patent: 4425481 (1984-01-01), Mansgold et al.
patent: 4471171 (1984-09-01), Kopke
patent: 4508940 (1985-04-01), Steeger
patent: 4596902 (1986-06-01), Gilman
Hearing Instruments, "Active Filkring-A Step Toward the Programmable Hearing Aid", Rihs et al., vol. 33, No. 1, Oct. 1982, p. 20t.
Wayne J. Stabb, Hearing Instruments, "Digital Hearing Aids", vol. 36, No. 11, pp. 14-24.

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