Electret condenser microphone

摘要

An electret condenser microphone has a casing member including a circular inlet portion and a cylindrical side portion integrally formed with each other, the side portion having a first section close to the inlet portion and a second section remote from the inlet portion and radially inwardly bent, a printed circuit board in the form of a circular shape and disposed in the casing member to be held in contact with the second section an electrode plate accommodated in a casing space defined by the casing member and the printed circuit board, an electrically connecting member intervening between and electrically connecting the printed circuit board and the electrode plate the electrically connecting member being partly disposed on and along the circumference of the printed circuit board, and a diaphragm located between the inlet portion and the electrode plate.