| 摘要 |
PURPOSE:To form a sound field desired by a listener by changing an amount of the reverberation by mounting a speaker directly amplifying respective channels from an acoustic source closely to a reverberation speaker to which the reverberation is artificially added. CONSTITUTION:R, L channels of an acoustic source 1 are passed through a preamplifier 2, the R channel is passed through power amplifiers 3, 4 to drive side speakers 8(R), 7(R). By channel change-over switches 18a-c, R or L channel is taken out to change a phase by reverberation circuits 22-24 through volumes 19-21 and add the reverberation and drive reverberation speakers 28, 29 and 30 through power amplifiers 25-27. Side speakers 7, 8 and a center speaker 9 and the reverberation speakers 28, 30 and 29 are closely mounted and the reverberation can be turned on and off and made a level adjustement. Thereby, a listener forms a desired sound field in accordance with the type of the acoustic source 1. |
