| 发明名称 |
PERFECCIONAMIENTOS EN LOS MICROFONOS. |
| 摘要 |
<p>A miniature unidirectional condenser microphone includes a diaphragm dividing a housing into first and second chambers. Each chamber communicates through a sound inlet port to the atmosphere. One of the sound inlet ports is covered by a sheet of porous, non-absorbent, hydrophobic thermoplastic material forming an acoustical resistance.</p> |
| 申请公布号 |
ES447550(A1) |
申请公布日期 |
1977.07.01 |
| 申请号 |
ES19500004475 |
申请日期 |
1976.05.03 |
| 申请人 |
THERMO ELECTRON CORPORATION |
发明人 |
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| 分类号 |
H04R1/38;H04R19/04;H04R25/00;(IPC1-7):04R/ |
主分类号 |
H04R1/38 |
| 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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