Automatic sound volume controlling device for use in automotive

Details Automatic sound volume controlling device for use in automotive Automatic sound volume controlling device for use in automotive

1986-07-16

1988-05-03

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including gain control means

330284, H03G 330

Patent

active

047423102

ABSTRACT:
An automatic sound volume device which adjusts the volume of an audio signal in a vehicle to compensate for vehicle noise. A time constant circuit smooths the level output of a microphone to smooth the volume variations. However, the time constant is long for increases in noise but short for decreases in noise.

REFERENCES:
patent: 4134079 (1979-01-01), Kohtani

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