Dynamic microphone unit and dynamic microphone
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United States of America Patent
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Jul 28, 2015
Grant Date -
Jan 1, 2015
app pub date -
Jun 19, 2014
filing date -
Jun 27, 2013
priority date (Note) -
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Abstract
A dynamic microphone unit includes a diaphragm vibrating upon receiving acoustic waves, a voice coil fixed to the diaphragm, vibrating together with the diaphragm, a magnetic circuit generating a magnetic field in a magnetic gap in which the voice coil is disposed, a rear air chamber formed behind the magnetic circuit, wherein holes for connecting a back side space of the diaphragm with the rear air chamber are formed in a member forming the magnetic circuit in order to reduce resonance and reduce peaks developing in frequency response characteristics, achieving uniformity of directivity.
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