发明名称 |
Variable directional condenser microphone unit |
摘要 |
To prevent sensitivity from lowering on switching to non-directionality as to a variable directional condenser microphone unit capable of switching to unidirectionality or non-directionality by opening and closing a rear acoustic terminal of a unidirectional condenser microphone unit. The variable directional condenser microphone unit has a converter 20 consisting of a diaphragm 21 set up on a supporter ring 22 and a fixed pole 23 supported by a seat 24 oppositely placed via a spacer housed in a cylindrical housing 10 including a front acoustic terminal 11 , the microphone unit being unidirectional in the case where a rear acoustic terminal 24 a provided on the seat 24 is open and being switchable to non-directionality by blocking the rear acoustic terminal 24 a, wherein an air chamber A 1 for complementing non-directional components is provided on the rear acoustic terminal 24 a side.
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申请公布号 |
US2008002837(A1) |
申请公布日期 |
2008.01.03 |
申请号 |
US20060477914 |
申请日期 |
2006.06.30 |
申请人 |
KABUSHIKI KAISHA AUDIO-TECHNICA |
发明人 |
AKINO HIROSHI |
分类号 |
H04R3/00;H04R9/08;H04R19/04 |
主分类号 |
H04R3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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