| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the quality of a surround sound field generated by an array speaker apparatus that outputs sound beams of multichannels from an array speaker, and generates the surround sound field by generating a virtual sound source by wall reflection. <P>SOLUTION: A signal of each channel of RL, FL, C, FR, and RR is divided into a high-pass signal and a low-pass signal by HPF and LPF, respectively. Los-pass signals of RL, FL, and C channels are superimposed to be output from a left side woofer 21-1, and low-pass signals of RR, FR, and C channels are superimposed to be output from a right side woofer 21-2. High-pass signals of the above channels are given predetermined directivity by derectivity controls 17-1 to 17-5 respectively, output from each speaker unit 20-1 to 20-n of the array speaker, and generate a virtual sound source by wall reflection. A surround sound field of high quality is generated by letting a rear channel be a narrow beam by making a crossover frequency f2 of real channels (RL, RR) higher than a crossover frequency f1 of front channels (FL, FR). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
