Patent ID: 7916886

Claim:
A microphone comprising: a housing, wherein an inner surface of the housing includes a housing channel; a port disposed in the housing leading to an interior chamber; a diaphragm; a diaphragm support disposed between the diaphragm and the housing; a backplate; a diaphragm spacer disposed between the diaphragm and the backplate to create a gap between the diaphragm and backplate; an insulating spacer disposed in a lower portion of the interior chamber below the diaphragm and backplate, wherein the insulating spacer includes an insulator aperture adjacent the housing channel, wherein the diaphragm, diaphragm support, backplate, diaphragm spacer, and insulating spacer are disposed in the interior chamber, and wherein the housing channel and the insulator aperture form a shunting channel for low frequency signal components around the diaphragm.