Patent ID: 7474753

Claim:
A sound field control apparatus comprising: a master device comprising a picked-up sound signal input section that inputs picked-up sound signals from a plurality of microphones installed at different locations, a reflected sound signal generating section that generates reflected sound signals by performing signal processing on the input picked-up sound signals according to a master algorithm including a signal switch circuit and plural reflectors, and a reflected sound signal output section that outputs the generated reflected sound signals; and a plurality of slave devices connected in cascade to said master device, each of said slave devices comprising a reflected sound signal input section that inputs the generated reflected sound signals from said master device, and a plurality of output signal generating sections corresponding to a plurality of speakers installed at different locations, each of said plurality of output signal generating sections adjusting sound characteristics of the input reflected sound signals, mixing the adjusted input signals to generate an output signal, and outputting the output signal to the corresponding speakers, according to a slave algorithm including delay devices for adjusting the reflected sounds in delay, attenuators for adjusting the reflected sounds in level, and adders for mixing the adjusted signals, and a reflected sound signal output section that directly outputs the input reflected sound signals to the next one of said slave devices; wherein said slave devices comprise a desired number of slave devices serially connected in cascade to said master device, and said speakers correspond in number to a number of said slave devices.