Audio amplifier systems

Details Audio amplifier systems Audio amplifier systems

1974-07-29

1976-01-20

Olms, Douglas W.

179 1VL, H03G 300

Patent

active

039340856

ABSTRACT:
An audio amplifier system is provided comprising a variable gain amplifier adapted to receive an input signal, means for detecting periods when the input signal falls below a predetermined level, and sound transducer means arranged to provide a signal proportional to the sound level in the area or part thereof covered by the system for controlling the gain of the amplifier. An inhibitor is provided which is arranged to be controlled by the detecting means so as to prevent any change of the gain of the variable gain amplifier except during periods when the input signal falls below the said predetermined level.

REFERENCES:
patent: 2503391 (1950-04-01), Kannenberg
patent: 2564437 (1951-08-01), Kannenberg
patent: 2575990 (1951-11-01), Augustadt
patent: 2616971 (1952-11-01), Kannenberg
patent: 2668874 (1954-02-01), Augustadt
patent: 3296373 (1967-01-01), Suganuma
patent: 3410958 (1968-11-01), Cohen
patent: 3444323 (1969-05-01), Nagashima et al.

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