| 摘要 |
PURPOSE:To realize presence and a feeling of spread equivalent to those of an actual concert hall by emitting stereo sounds from front right and left speakers and emitting sounds and initial reflection sounds, which are obtained by subjecting sounds to delay processing, from central right and left speakers directed to the front glass of a vehicle. CONSTITUTION:Stereo signals L and R of a stereo reproducing circuit 17 directly drive front left and right speakers 6 and 7. The output of an adder 28 is inputted to an initial reflection sound producing part 22 through a delay device 32, and the output and output signals L and R of the stereo reproducing circuit 17 are inputted to adders 34 and 35 of central left and right speakers 14 and 15 to drive central left and right speakers 14 and 15. Signals L and R of lines 18 and 19 are inputted to adders 34 and 35 also. Meanwhile, the output of the delay device 32 is inputted to a reverberation sound producing part 37, and the left channel side of the output is inputted to the adder 34 through a delay device 38. The acoustic signal of the right channel is given to the adder 35 through a coefficient device 39. Thus, presence and a feeling of spread equivalent to those of an actual concert hall are realized. |
