To suppress the change of a sound volume offensive to the ear while improving audibility for the occurrence of noise by starting adjustment of the intensity level for the low frequency band in prescribed range of an audio signal at a timing different from the start timing of signal intensity adjustment in accordance with a detected noise level.

When noise control is designated by an operation part 4, the noise level is detected, and sound volume correction for the sound signal in an overall area is performed in accordance with the noise level. When a prescribed time has passed after detection of the noise level, sound volume correction is started for the sound signal in a low band in accordance with the noise level. Consequently, sound volume correction for the sound signal in the low band is not performed with respect to a short-period noise for a prescribed time. In this device, a control signal to an electronic volume circuit 22 is outputted from a control part 5 on the basis of a sound volume indication value, which a user inputs from an operation switch or the like of the operation part 4, and the noise level signal from a signal level difference detection circuit 20.