| 摘要 |
An electret condenser microphoneelectret condenser microphone includes a capsule, diaphragm ring with attached diaphragm, back electrode plate having an electret-dielectric-film-coated surface facing the diaphragm, insulating spacer with space between the back electrode plate and the diaphragm, impedance converter, flexible printed circuit board in which a hollow cylinder, a flange projecting radially from an edge of the hollow cylinder on one end face facing the back electrode plate, and a rear plate blocking the other end face of the hollow cylinder are integrally formed, in which the impedance converter is placed on a surface of the rear plate facing the back electrode plate, and gate ring electrically connecting the back electrode plate to wiring on the flexible printed circuit board. An edge on an open side of the capsule bends inwardly to fit against the flange of the flexible printed circuit board.
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