发明名称 |
AN 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. |
申请公布号 |
WO03024151(A1) |
申请公布日期 |
2003.03.20 |
申请号 |
WO2002DK00592 |
申请日期 |
2002.09.11 |
申请人 |
SONIONKIRK A/S;JOHANNSEN, LEIF;VAN HALTEREN, AART, ZEGER |
发明人 |
JOHANNSEN, LEIF;VAN HALTEREN, AART, ZEGER |
分类号 |
H04R1/00;H04R1/02;H04R7/02;H04R7/04;H04R9/00;H04R9/02;H04R9/06;H04R9/08;H04R25/00;H04R31/00 |
主分类号 |
H04R1/00 |
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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