| 摘要 |
PURPOSE:To attain a conference using a voice conference equipment smoothly by generating a similar voice signal suppressing howling due to a loop in a conference room as a voice signal from a microphone and broadcasting the signal from a speaker. CONSTITUTION:A voice signal from a microphone 1 is fed to an amplifier 4 and a rectifier 5, inputted to an amplifier 18 of a similar voice generating circuit 3, amplified and inputted to a limiter 9. The amplification factor of a voltage controlled amplifier 11 is changed in response to the applied voltage and a voltage being the result of rectifying the voice signal from the microphone 1 by the rectifier 5 is applied to the amplifier 11, the amplitude modulation is applied to the input signal in response to the sound quantity of the voice signal, amplified by an amplifier 6, broadcasted from a speaker 2 and a confirming tone is obtained to a talker, representing that his/her voice is sent to an opposite conference room. Since the talker confirms that his/her own voice is sent to the opposite conference room, the disease whether or not the voice is sent to the opposite conference room is eliminated. |
