Automatic volume control to compensate for ambient noise variati

Details Automatic volume control to compensate for ambient noise variati Automatic volume control to compensate for ambient noise variati

1996-10-17

1997-09-09

Kuntz, Curtis

Electrical audio signal processing systems and devices

Monitoring of sound

Amplification control responsive to ambient sound

381104, 381107, H03G 320

Patent

active

056664265

ABSTRACT:
A system and method for automatically adjusting the volume of an audio system to compensate for variations in ambient noise. The system includes a microphone for monitoring the ambient audio environment which includes output of the audio system plus environmental noise. The system also includes processing circuitry connected to the microphone. The processing circuitry varies the volume of the output of the audio system in proportion to changes in the environmental noise. The processing circuitry comprises the microphone, located to detect the ambient sound in the listening environment, an analog-to-digital converter connected to the output of the microphone, and a digital signal processor connected to the output of the analog-to-digital converter. The output signal of the DSP is an input to the volume control of the audio system.

REFERENCES:
patent: 5081682 (1992-01-01), Kato
patent: 5434922 (1995-07-01), Miller
patent: 5450494 (1995-09-01), Okubo

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