发明名称 |
ELECTRET TRANSDUCER |
摘要 |
The present invention relates to an electret transducer, which has surface layers (3) made of conducing material, between which layers there is electret material (1) and which surface layers include connecting elements (4) for connecting the transducer to a measuring apparatus. Characteristic to the electret transducer in accordance with the invention is the fact that between the electret material (1) and the surface layer (3) material layer (2) transversally conducting electricity has been placed.
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申请公布号 |
WO03102983(A1) |
申请公布日期 |
2003.12.11 |
申请号 |
WO2002FI00441 |
申请日期 |
2002.05.22 |
申请人 |
OLKKONEN, HANNU;HEIKKINEN, PAAVO |
发明人 |
OLKKONEN, HANNU;HEIKKINEN, PAAVO |
分类号 |
H01G7/02;H04R19/01;(IPC1-7):H01G7/02 |
主分类号 |
H01G7/02 |
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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