| 摘要 |
PURPOSE:To btain the spread feeling of sound which makes a person perceive a large space by supplying the audio source signals of both right and left channels and, delay signals and initial reflected sound string for them from a main speaker at the front of right and left doors and an auxiliary speaker at the rear sides of the doors. CONSTITUTION:Right and left audio signals outputted from a signal line 7 are supplied to a digital signal processing part 8 with a single digital transmission line. The processing part 8 separates the signals to L channel and R channel, and supplies them to two-channel D/A amplifiers 11 and 12 in the right and left doors through each digital transmission line, respectively. And right and left audio source signals or the delay signals for them are reproduced from right and left door main speakers 3 and 4 and right and left door auxiliary speakers 5 and 6. In such a way, it is possible to save a transmission line to the speaker, and to obtain the spread feeling with satisfactory sound quality without generating the deterioration of the signal. |
