Acoustic device
摘要
說(shuō)明書
Here, the speaker 11LP and the speaker 11RP are arranged at a predetermined interval in a first direction (indicated by an arrow P) corresponding to a left and right direction of a listener M while the headrest 13 is interposed between the speaker 11LP and the speaker 11RP. The speaker 11LS is arranged at the same position as the speaker 11LP in the first direction. In addition, the speaker 11RS is arranged at the same position as the speaker 11RP in the first direction. Note that, the wording “same position” described herein does not have to mean exactly the same position. Some minor deviations are allowed.
The speaker 11LP is driven by a left ear signal SL for stereophonic reproduction (virtual surround). The speaker 11LS is driven by a reversed-phase signal SL′ obtained from the left ear signal SL by a signal processor 14L. In this case, the signal processor 14L adjusts the level of the reversed-phase signal SL′ in such a manner that the speakers 11LP and 11LS reproduce the left ear signal with bidirectional directivity.
In addition, the speaker 11RP is driven by a right ear signal SR for stereophonic reproduction (virtual surround). The speaker 11RS is driven by a reversed-phase signal SR′ obtained from the right ear signal SR by a signal processor 14R. In this case, the signal processor 14R adjusts the level of the reversed-phase signal SR′ in such a manner that the speakers 11RP and 11RS reproduce the right ear signal with bidirectional directivity.
