Narrow-angle directional microphone
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United States of America Patent
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Apr 10, 2018
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N/A
app pub date -
Oct 10, 2016
filing date -
Dec 3, 2015
priority date (Note) -
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Abstract
A narrow-angle directional microphone includes: a microphone case; an acoustic tube fit in the microphone case with a gap between the acoustic tube and the microphone case; a microphone element arranged at one end side of the acoustic tube with a clearance that allows a front acoustic terminal and a rear acoustic terminal to communicate into each other between the microphone element and the microphone case; and an acoustic resistance body having elasticity positioned over between the one end side of the acoustic tube and the microphone element to block a passage between the front acoustic terminal and the rear acoustic terminal, whereby adjustments of a degree of compression of the acoustic resistance body are achieved by changes to an interval between the acoustic tube and the microphone element.
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