Patent ID: 7260230

Claim:
An electret microphone comprising: a housing having an acoustic port formed in a wall thereof; a diaphragm assembly being electrically conductive and electrically coupled to the housing, the diaphragm assembly positioned adjacent to the wall; an insulating spacer placed adjacent to the diaphragm on a side of the diaphragm opposite the acoustic port; a backplate assembly, the backplate assembly with a protrusion radially extending from an outer circumference, the backplate in contact with the insulating spacer; a body assembly, the body assembly molded of plastic, having a first end and a second end, the body assembly adapted for insertion into the housing and being hollow with an inner periphery adapted to receive the backplate assembly, the body assembly further comprising: a conductive mount disposed in the body assembly, the conductive mount having a first end and a second end, the conductive mount electrically insulated from the housing by an outer circumference of the body assembly, the first end of the conductive mount disposed into the hollow portion of the body assembly for electrically coupling with the backplate assembly, the second end of the conductive mount extending to the second end of the body assembly; and a printed circuit board adapted for coupling to the second end of the body assembly, the printed circuit board having a first surface and a second surface, wherein the first surface is electrically coupled to the second end of the conductive mount and the second surface is coupled to the housing, whereby an acoustic passage is formed at the sides of the protrusion between an inner circumference of the housing and an outer circumference of the backplate assembly, the acoustic passage allowing air flow created by movement of the diaphragm responsive to acoustic energy coupled into the acoustic port.