| 摘要 |
PROBLEM TO BE SOLVED: To obtain a diaphragm for an electroacoustic transducer that continuously generates a large number of negative ions even when the speaker is not in use. SOLUTION: A diaphragm for an electroacoustic transducer has a diaphragm structure wherein negative ion generation material is exposed and fixed. The negative ion generation material is, for example, fine particles of a sedimentary coral and/or those ofβ-ray ores. COPYRIGHT: (C)2004,JPO
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