Patent ID: 8194895

Claim:
A condenser microphone comprising a microphone capsule and a microphone main body, the microphone capsule being configured so that an acoustic-electric converter including a diaphragm and a backplate is accommodated in a metallic capsule housing provided with an acoustic terminal on one end surface side and an opening part on the other end surface side, and an extraction electrode of the backplate is disposed in substantially the central portion of the opening part, and the microphone main body being configured so that a circuit board is disposed at a predetermined depth position in a connection-side opening part of a microphone housing formed of a metallic cylindrical body to which the capsule housing is detachably connected, and a field effect transistor and a conductive contacting means for connecting the gate of the field effect transistor to the extraction electrode are disposed; and configured so that the extraction electrode is connected to the gate of the field effect transistor via the conductive contacting means with the connection of the capsule housing to the microphone housing, wherein the conductive contacting means is formed of a conductive elastic material, and a ferrite material is disposed on the circuit board so as to surround the conductive elastic material.