Condenser microphone

Details Condenser microphone Condenser microphone

2005-05-16

2009-08-25

Milord, Marceau (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S137000, C455S575500, C455S149000, C381S384000, C381S369000, C381S355000, C381S324000, C381S113000

Reexamination Certificate

active

07580735

ABSTRACT:
In a condenser microphone where a microphone capsule and an output module section are connected to each other via a microphone cord, strong electromagnetic waves generated from a cellular phone or the like are positively prevented from entering the output module section through the microphone cord. The condenser microphone in which a microphone capsule10and an output module section20are connected to each other via a microphone cord30composed of a twin-core shield covered wire, the microphone capsule10including a condenser microphone unit12and an impedance converter13, the output module section20storing, in a shield case21, a circuit board22including a voice output circuit, wherein a shield covered wire33of the microphone cord30is connected to the shield case21, and the shield covered wire33is also connected to a ground circuit of the circuit board22via a high-frequency choke coil51.

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