Automatic sound volume control device

Details Automatic sound volume control device Automatic sound volume control device

1982-06-14

1984-10-09

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Monitoring of sound

Amplification control responsive to ambient sound

381107, H04B 116

Patent

active

044765711

ABSTRACT:
An automatic volume control device for a car stereo or the like which adjusts the volume according to an environmental noise level includes a microphone and a low pass filter circuit whose characteristic is designed so as to correspond to the human auditory characteristic at a low frequency end, but so as to cut out higher frequency components such as voices, etc. A time constant circuit serves to smooth volume transients in case the environmental noise sharply increases.

REFERENCES:
patent: 2501327 (1950-03-01), Good
patent: 3497622 (1970-02-01), Markin et al.
patent: 3934084 (1976-01-01), Munson et al.
patent: 4247955 (1981-01-01), Weidmann

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