| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent beforehand the generation of coloration or howling in sound space without giving discomfort to a listener. <P>SOLUTION: An EMR 42 switches periodically the combination of connection of a microphone 10 and a speaker 20 in a sound feedback system in following manner: a sound space 1→microphone 10→a temporally changing processing portion 41→EMR 42→a FIR filter 44→a equalizer 45→a level delay matrix 46→a speaker 20→a sound space 1. A CPU 47 changes the processing content of the temporally changing processing portion 41 which is downstream of the microphone 10 and not connected to the speaker 20 at the time of changing of the combination of connection between the microphone 10 and the speaker 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
