Audio signal adjustment device and audio signal adjustment method having long and short term gain adjustment

Abstract

To perform volume control matching the actual auditory sensation level of a human so as to improve the control accuracy. As shown in FIG., an audio gain adjustment deviceincludes: an audio signal input sectionthat acquires an audio signal to be adjusted; a long-term gain reflection sectionthat reflects the adjustment of long-term gain in the acquired audio signal; a frequency division sectionthat divides the audio signal from the long-term gain reflection sectioninto three frequency bands; a short-term gain reflection sectionthat reflects the adjustment of short-term gain in each frequency band; a synthesis sectionthat synthesizes audio signals output from the short-term gain reflection section; and an audio signal output sectionthat outputs the synthesized audio signal.