发明名称 |
MICROPHONE DEVICE |
摘要 |
<p>To provide a small, inexpensive microphone system which can reduce extraneous vibration noise. The microphone system has a first microphone mechanism 1a which has a sound hole for introducing sound and a second microphone mechanism 1b which is enclosed without a sound hole. The first microphone mechanism 1a and the second microphone mechanism 1b have approximately the same inner structure and are coupled rigidly or formed integrally. The microphone system outputs a differential signal using either a processing circuit 7 which outputs differential signal based on output difference between the first microphone mechanism 1a and second microphone mechanism 1b or electrodes arranged in opposite directions.</p> |
申请公布号 |
EP1821569(A1) |
申请公布日期 |
2007.08.22 |
申请号 |
EP20050814694 |
申请日期 |
2005.12.07 |
申请人 |
NTT DOCOMO, INC. |
发明人 |
FUKUMOTO, MASAAKI;ETOH, MINORU |
分类号 |
H04R1/40;H04R3/00;H04R1/02 |
主分类号 |
H04R1/40 |
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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