Unidirectional condenser microphone unit, unidirectional condenser microphone, and method of manufacturing unidirectional condenser microphone unit
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United States of America Patent
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May 8, 2018
Issued Date -
N/A
app pub date -
Sep 1, 2016
filing date -
Sep 16, 2015
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Abstract
A unidirectional condenser microphone unit is provided that have directionality unaffected by the external environment, and a method of manufacturing the unidirectional condenser microphone. The unidirectional condenser microphone unit having an interior and an exterior, the unidirectional condenser microphone includes a diaphragm, a fixed electrode facing the diaphragm, the fixed electrode constituting a capacitor with the diaphragm, an insulating base disposed in a back face side of the fixed electrode, the insulating base supporting the fixed electrode, an air chamber disposed in the back face side of the fixed electrode, and a gap disposed between the fixed electrode and the insulating base. The fixed electrode includes at least one sound hole in communication with the air chamber. The insulating base includes a communication hole establishing communication between the gap and the exterior of the microphone unit. The air chamber and the gap are in communication with each other.
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