发明名称 |
Electro-acoustic transducer with two diaphragms |
摘要 |
The present invention relates to an electro-acoustic transducer suitable for applications within mobile communication equipment and hearing aids. The transducer comprises two diaphragms positioned on opposite sides of a magnetic circuit having two magnetic gaps. When used as a microphone the transducer is substantially insensitive to vibrations, and when used as a speaker the transducer generates only very low vibration levels. The magnetic circuit has a number of advantages compared to conventional transducers with circular magnetic. The transducer can be made lightweight and with very compact dimensions compared to conventional designs. In a preferred embodiment the diaphragms are rectangular. The transducer may additionally be used as a vibration generator for silent alarm signals.
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申请公布号 |
US2003048920(A1) |
申请公布日期 |
2003.03.13 |
申请号 |
US20020238857 |
申请日期 |
2002.09.11 |
申请人 |
VAN HALTEREN AART ZEGER;JOHANNSEN LEIF |
发明人 |
VAN HALTEREN AART ZEGER;JOHANNSEN LEIF |
分类号 |
H04R9/06;H04R25/00;(IPC1-7):H04R25/00;H04R1/00;H04R11/02 |
主分类号 |
H04R9/06 |
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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