| 发明名称 |
Electro-acoustic transducers. |
| 摘要 |
An acoustic transducer such as a dome loudspeaker has a membrane of polyamide 12 mixed with plasticizer, offering an improved consistency of frequency characteristic above 5 kHz and a lower natural resonance frequency than previously used materials such as Supronyl.
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| 申请公布号 |
EP0009351(A1) |
申请公布日期 |
1980.04.02 |
| 申请号 |
EP19790301818 |
申请日期 |
1979.09.04 |
| 申请人 |
THE RANK ORGANISATION LIMITED |
发明人 |
MEYER, NORBERT |
| 分类号 |
H04R7/02;H04R7/12;(IPC1-7):H04R7/02 |
主分类号 |
H04R7/02 |
| 代理机构 |
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