| 摘要 |
PURPOSE:To ensure the smooth talking for the sound volume adjustor for the speaker of the TV or the like, by securing actuation of the microswitch by picking up the telephone receiver and thus securing the automatic reduction of the sound volume. CONSTITUTION:Microswitch 3 is turned off when telephone receiver 2 is picked up. Then the reduction is given to the sound volume of speaker 5 since the current flowing to volume 10 from amplifier 8 passes through volume 6. The automatic reduction is ensured for the sound volume of speaker 5 of sound generator 4 when receiver 2 of telephone 1 is picked up, thus ensuring the smooth talking. |
