Condenser microphone

Details Condenser microphone Condenser microphone

2008-06-03

2008-06-03

Ni, Suhan (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic microphone

C381S111000, C381S384000

Reexamination Certificate

active

07382889

ABSTRACT:
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 case10containing an electronic circuit20for a condenser microphone unit and a 3-pin type output connector30attached to the microphone case10and to which a microphone cable40from an external apparatus including a polarization power source is connected. A first pin for grounding included in the output connector30is connected directly to the microphone case10and is also connected to a ground of the electronic circuit20via a high-frequency choke coil31.

REFERENCES:
patent: 6084972 (2000-07-01), van Halteren et al.

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