| 摘要 |
PURPOSE:To facilitate the adjustment by providing a control means controlling the automatic attenuator automatically so as to bring a voice output level from a speaker to a prescribed level in response to the detection level of a microphone to a remote control transmitter or a device main body. CONSTITUTION:A microphone 20 detecting a voice corresponding to a test tone signal outputted from speakers 1-5 of the device main body is provided to a remote control transmitter. Then a control means 21 controlling an automatic attenuator 11 automatically is provided to the remote control transmitter or the device main body so that the voice output level from the speakers 1-5 reaches a prescribed level. Thus, the voice output level is sequentially adjusted automatically by having only to detect the voice from the speakers 1-5 sequentially with the microphone arranged to the prescribed location. |
