Speech operated noise attenuation device

Details Speech operated noise attenuation device Speech operated noise attenuation device

1989-09-28

1991-07-30

Harkcom, Gary V.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 71, 381 94, H04B 1500

Patent

active

050365401

ABSTRACT:
A speech operated noise attenuation device (SONAD) includes circuitry to measure the noise level in an audio channel. The output of the noise measurement circuitry provides a control signal to an audio attenuator which varies the intersyllable attenuation of the background noise according to the noise level present in the audio.

REFERENCES:
patent: 4630304 (1986-12-01), Borth et al.
patent: 4747143 (1988-05-01), Kroeger et al.
patent: 4759071 (1988-07-01), Heide
patent: 4811404 (1989-03-01), Vilmur et al.
patent: 4918734 (1990-04-01), Muramatsu et al.

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