Patent ID: 8705775

Claim:
A microphone, comprising: a back plate deposited on a portion of a first printed circuit board; a diaphragm positioned relative to the portion of the first printed circuit board so as to form a first volume between the diaphragm and the back plate, wherein a front surface of the diaphragm is in contact with the first volume, wherein a back surface of the diaphragm is in contact with a second volume, wherein one of the first volume and the second volume is in low acoustic impedance contact with the ambient acoustic environment and the other of the first volume and the second volume is in high acoustical impedance contact with the ambient acoustic environment, wherein when the diaphragm flexes in response to acoustic pressure, an output signal related to the acoustic pressure on the diaphragm is produced; and an enclosure, wherein the second volume is within the enclosure; wherein the first volume is in low acoustic impedance contact with the ambient acoustic environment and the second volume is in high acoustic impedance contact with the ambient acoustic environment; and wherein the enclosure comprises: the first printed circuit board; a second printed circuit board; and one or more spacer printed circuit boards, wherein the first printed circuit board, the one or more spacer printed circuit boards, and the second printed circuit board are attached to form the enclosure, wherein the diaphragm is within the enclosure.