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Abstract

A loudness control circuit for an audio device used in a reproduction circuit for reproducing a music signal recorded on a recording medium comprises one or plural level detection circuits for detecting levels of signal components of low and high frequency regions of a reproduced signal and control circuits for controlling the levels of the signal components of low and high frequency regions of the reproduced signal in response to outputs of the level detection circuits. The level control is made in accordance with a sound-pressure level for each frequency region of a reproduced signal so that an optimum compensation of the level in response to the sound-pressure level becomes possible.

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