Hearing aid

Details Hearing aid Hearing aid

1982-10-08

1984-12-25

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 68, H04R 2500

Patent

active

044905858

ABSTRACT:
A hearing aid is made up of an automatic filter circuit for transmitting an input signal in a predetermined characteristic, and a low frequency component detecting circuit for detecting the low frequency component of the input signal, to change the characteristic of the automatic filter circuit according to the detection level, the cut-off frequency of the automatic filter circuit being changed according to the output control signal of the low frequency component detecting circuit.

REFERENCES:
patent: 3209083 (1965-09-01), Posen
patent: 3764745 (1978-10-01), Bottcher
patent: 3920931 (1975-11-01), Yanick
patent: 4025721 (1977-05-01), Graupe
patent: 4119814 (1978-10-01), Harless
patent: 4405831 (1983-09-01), Michelson

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