发明名称 |
Electret transducer with tapered acoustic chamber |
摘要 |
An electret transducer wherein a backplate is mounted between inwardly disposed surfaces of a ridge protruding from a face of a frame, a diaphragm is mounted on the ridge, and an acoustic chamber, which is partially defined by the diaphragm, diminishes in size as it becomes more remote from an opening to it.
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申请公布号 |
US4331840(A) |
申请公布日期 |
1982.05.25 |
申请号 |
US19800123718 |
申请日期 |
1980.02.22 |
申请人 |
LECTRET S.A. |
发明人 |
MURPHY, PRESTON V.;HUEBSCHI, KURT |
分类号 |
H04R1/22;H04R19/01;H04R25/00;(IPC1-7):H04R19/04 |
主分类号 |
H04R1/22 |
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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