| 摘要 |
An audio apparatus includes a touch detective muting arrangement. Switch actuating knobs made of metal are electrically insulated from the circuit ground and connected to an electro-static field detector circuit detecting a touch of an operator's finger with the knobs and producing a control signal. A muting circuit is provided in the audio signal path and connected to the detector circuit to be controlled by the control signal. When a finger touches the knob, the muting circuit is rendered operative to mute the audio signal, thus preventing undesirable click noise which might otherwise come out in accordance with changing-over manipulation of the switch.
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