Stereo microphone unit and stereo microphone
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United States of America Patent
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Oct 15, 2013
Grant Date -
May 5, 2011
app pub date -
Sep 14, 2010
filing date -
Sep 15, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A stereo capacitor microphone unit includes: two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other; and an insulating spacer that is interposed between the fixed electrodes and provided with a gap formed at a portion of an outer periphery towards radial direction. The gap communicates fixed electrode rear spaces of the respective unidirectional microphone units with an external space to serve as a common rear acoustic terminal for the unidirectional microphone units.
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