Patent ID: 9554212
Date: 2017-01-24
CPC Classifications: H01L,H04R,H05K,Y10T

Claim:
1. A microphone, comprising: a back plate fabricated on a portion of a printed circuit board; and a diaphragm positioned relative to the portion of the 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 first volume is within the enclosure; wherein the first volume is in high acoustic impedance contact with the ambient acoustic environment the second volume is in low acoustic impedance contact with the ambient acoustic environment; and wherein the enclosure comprises: wherein the diaphragm is within the enclosure.