| 摘要 |
The present invention prevents the occurrence of noise caused by an external electromagnetic wave. The present invention also prevents a high voltage from appearing in the microphone case, thus avoiding the possibility of an electric shock. A condenser microphone includes a conductive microphone case 10 containing an electronic circuit 20 for a condenser microphone unit and a 3-pin type output connector 30 attached to the microphone case 10 and to which a microphone cable 40 from an external apparatus including a polarization power source is connected. A first pin for grounding included in the output connector 30 is connected directly to the microphone case 10 and is also connected to a ground of the electronic circuit 20 via a high-frequency choke coil 31.
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