Automatic sound level control system for audio equipment

摘要

An automatic sound level control system for audio equipment comprises means for controlling the gain of an amplifier for amplifying an audio input signal in accordance with manually selected level and the ambient noise level so that the output sound level is increased with the ambient noise level. The rate at which the sound level is increased with ambient noise is controlled high when the preset sound level selected by the listener is low, while that rate is controlled low when the preset sound level is high.