Acoustic device
摘要
說明書
The speakers 11LP and 11S are speakers for reproducing the left ear signal, and the speakers 11LP and 11S constitute two speakers arranged back-to-back to give directivity. In this case, the speaker 11LP constitutes a primary speaker, and the speaker 11S constitutes a secondary speaker.
The speakers 11RP and 11S are speakers for reproducing the right ear signal, and the speakers 11RP and 11S constitute two speakers arranged back-to-back to give directivity. In this case, the speaker 11RP constitutes a primary speaker, and the speaker 11S constitutes a secondary speaker. As described above, the speaker 11S serves as the secondary speakers for reproducing the left ear signal and the right ear signal.
The speaker 11LP is driven by the left ear signal SL for stereophonic reproduction (virtual surround). The speaker 11RP is driven by the right ear signal SR for the stereophonic reproduction (virtual surround).
The signal processor 14L processes the left ear signal SL and generates the reversed-phase signal SL′ with an adjusted level in such a manner that the speakers 11LP and 11S reproduce the left ear signal with bidirectional directivity as indicated by dashed lines. Note that, to simplify the drawing, the bidirectional directivity of the right ear signal reproduced by the speakers 11RP and 11S (to be described later) are not illustrated.
