发明名称 |
Electret condenser microphone |
摘要 |
An electret condenser microphone includes: a substrate 13 in which an opening 25 is formed; an electret condenser 50 connected to one face of the substrate 13 so as to close the opening 25 and having an acoustic hole 12 and a cavity 2; a drive circuit element 15 connected to the one face of the substrate 13; and a case 17 mounted over the substrate 13 so as to cover the electret condenser 50 and the drive circuit element 15. Electric contact is established at a joint part between the electret condenser 50 and the substrate 13. The acoustic hole 12 communicates with an external space through the opening 25. The cavity 2 and an internal region of the case 17 serve as a back air chamber for the electret condenser 50.
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申请公布号 |
US7466834(B2) |
申请公布日期 |
2008.12.16 |
申请号 |
US20050592116 |
申请日期 |
2005.02.24 |
申请人 |
PANASONIC CORPORATION |
发明人 |
OGURA HIROSHI;YAMAOKA TOHRU |
分类号 |
H04R25/00;H04R19/00;H04R19/01 |
主分类号 |
H04R25/00 |
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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