System for reproducing sound information

Details System for reproducing sound information System for reproducing sound information

1976-06-03

1977-12-06

Claffy, Kathleen H.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330134, 330138, H03G 320, H03G 918

Patent

active

040618749

ABSTRACT:
In an environment of acoustic noise, such as a car radio playing in traffic or engine noise, both the volume (AGC) and dynamic range (Compression) of the audio amplifier are controlled by a local ambient acoustic noise sensor, such that gain is increased and dynamic range decreased simultaneously with increased ambient noise.

REFERENCES:
patent: 3160707 (1964-12-01), Meyers
patent: 3241066 (1966-03-01), Ligotky
patent: 3247464 (1966-04-01), Morrison
patent: 3795876 (1974-03-01), Takahashi
patent: 3895322 (1975-07-01), Stewart

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