Patent ID: 7200239
Filing Date: 2007-04-03
Classification: H04R,H04S

Abstract:
1. An acoustic apparatus comprising: one or more front speakers disposed at a front side in a space for outputting a first audio signal; one or more rear speakers disposed at a rear side in the space for outputting a second audio signal; a volume control device for controlling main volume levels of the first audio signal and the second audio signal; a balance control device for attenuating one of a first volume level indicating volume level of the first audio signal and a second volume level indicating volume level of the second audio signal from the main volume level and for increasing the other one of the first volume level and the second volume level to be at the main volume level, from a state in which the one of the first volume level and the second volume level is set to the main volume level and the other one of the first volume level and the second volume level is attenuated from the main volume level; and a control device, wherein, in the state in which the one of the first volume level and the second volume level is set to the main volume level and the other one of the first volume level and the second volume level is attenuated from the main volume level, when an external audio signal is supplied to the speaker or speakers outputting the audio signal corresponding to the one of the first volume level and the second volume level, the control device controls the balance control device to increase the other one of the first volume level and the second volume level and simultaneously controls the volume control device to attenuate the main volume level by a predetermined amount.