Patent ID: 6904155

Claim:
An electret capacitor microphone, comprising: an electret capacitor section comprising a diaphragm and a backplate positioned opposite the diaphragm; an impedance conversion element for converting a change in the electrostatic capacity of the electret capacitor section into an electric impedance; and a case made of synthetic resin and accommodating the electret capacitor section and the impedance conversion element; wherein: the case comprises a synthetic resin-made base member and a synthetic resin-made housing member; the base member is formed integrally with a plurality of terminal members by insert molding; one end of the terminal member is exposed on an inner surface of the base member so as to form part of a conductive pattern; the other end of the terminal member is exposed on an outer surface of the base member as an external connection terminal portion; the impedance conversion element is mounted on the base member at a predetermined position in the conductive pattern; the base member includes a peripheral wall portion extending upward from an outer peripheral edge of the base member; and the synthetic resin-made housing member is fixed to the peripheral wall portion of the base member so as to form an outer housing.