| 摘要 |
PROBLEM TO BE SOLVED: To prevent abnormal sound from occurring since a voice coil comes into contact with a center pole in a speaker. SOLUTION: In the speaker 1 for detecting electrostatic capacity formed between the voice coil 4 and the center pole 5 for outputting as an electric signal, the portion of the center pole 5 that can come into contact with the voice coil 4 opposingly is coated with a non-conductive material 6. COPYRIGHT: (C)2008,JPO&INPIT
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