| 摘要 |
PURPOSE: A voice automatic switching system is provided to outputs an optimum voice without howling and noise due to interference between microphones by switching on a microphone channel to collect the optimum voice and switching off the other microphone channel according to the position of a speaker. CONSTITUTION: A filter(40) removes a noise and a wind sound collected in an amplified voice signal from an amplifier. An EQ controller(60) controls the frequency of the voice signal passing through a rectifier. A channel switch lever controller switches on a microphone channel collecting and outputting the only voice of a speaker, and fades the other microphone channel. The channel switch controller performs the minute switch with 1 to 2 dB steps not to generate the noise when switching on and off the microphone channel selectively. A CPU(200) is programmed to control a voice signal fade in/out slope at each channel to switch on and off the microphone channel to collect the voice of the speaker by detecting the voice signal from the plurality of microphones. |
