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摘要

PROBLEM TO BE SOLVED: To make a speaker system composed of a plurality of speaker units optimal acoustically and also for infrared radiation.;SOLUTION: In the speaker system composed of speaker units of 4 or more channels, front 2-channel speaker units 1FL and 1FR include infrared ray emitting means 3L and 3R for emitting infrared ray for transmitting audio signals, and rear 2-channel speaker units 1RL and 1RR include light receiving means 8L and 8R for receiving the infrared ray from the infrared ray emitting means 3L and 3R. A radiation angle of infrared rays from the infrared ray emitting means 3L and 3R of the front 2-channel speaker units 1FL and 1FR is made variable.;COPYRIGHT: (C)2005,JPO&NCIPI