Patent ID: 9674604
Date: 2017-06-06
CPC Classifications: H04R

Claim:
1. A microphone comprising: a housing; a first diaphragm and a second diaphragm provided in the housing, each diaphragm having a first side and a second side, the first and second diaphragms being parallel, the second sides of the first and second diaphragms facing each other; a first chamber delimited at least partly by the first side of the first diaphragm and an inner surface of the housing; a first opening from the first chamber and to surroundings of the microphone; a second chamber delimited at least partly by the first side of the second diaphragm and an inner surface of the housing; a second opening from the second chamber and to the surroundings; a common chamber delimited at least partly by the second side of the first diaphragm, the second side of the second diaphragm and an inner surface of the housing; a third opening from the common chamber and to the surroundings; a first back plate positioned adjacently to the first diaphragm; a second back plate positioned adjacently to the second diaphragm, wherein the first back plate is positioned in the first chamber and the second back plate is positioned in the second chamber or the first back plate and the second back plate are positioned in the common chamber; and at least one signal processor connected to the first and second diaphragms or first and second back plates and configured to output an output signal.