发明名称 |
OPTICAL ACOUSTOELECTRIC TRANSDUCER |
摘要 |
<p>An optical acoustoelectric transducer having a directivity pattern like a better 8 by receiving by a light-receiving element a reflected fraction of the light from a light-emitting device disposed at the center of a bottom plate that is parallel to a diaphragm, has an opening through which an acoustic wave enters, and is connected to supporting side plates. An optical acoustoelectric transducer having uniform amplitude characteristics in a wide frequency range by mixing by a mixer circuit the outputs of a plurality of optical microphones having diaphragms of mutually different thicknesses so as to make the receiving sensitivity uniform in different frequency ranges. A directional optical acoustoelectric transducer having a small size and wide band characteristics by arranging a plurality of light-emitting devices (LD) and a plurality of light-receiving elements (PD) corresponding to a plurality of diaphragms arranged parallel. <IMAGE></p> |
申请公布号 |
EP1239698(A1) |
申请公布日期 |
2002.09.11 |
申请号 |
EP20000981656 |
申请日期 |
2000.12.11 |
申请人 |
KABUSHIKI KAISHA KENWOOD |
发明人 |
KOBAYASHI, OKIHIRO;MIYAHARA, NOBUHIRO;HATTORI, YUTAKA;MIYAZAWA, HIROSHI;HAYAKAWA, JUNICHI |
分类号 |
H04R3/00;H04R23/00;(IPC1-7):H04R23/00 |
主分类号 |
H04R3/00 |
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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