| 摘要 |
PROBLEM TO BE SOLVED: To provide a loudspeaker system capable of reducing wear in an acoustic diaphragm, and maintaining stable tone quality and a volume, even if a sound is reproduced for a long time. SOLUTION: A cushion member 35 is formed in a cap shape using a material such as an ETFE (tetrafluoroethylene-ethylene copolymer) etc., of which the Durometer D is within a range of 30-75. The cushion member 35 is installed at the tip of a driving rod 31 of a magneto-striction actuator 30. The magneto-striction actuator 30 is driven, and the displacement of the driving rod 31 is delivered to the acoustic diaphragm 10. Then, the acoustic diaphragm 10 is vibrated, and the sound is reproduced. COPYRIGHT: (C)2009,JPO&INPIT
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