| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibration unit which has high impact resistance, from which high sound pressure and excellent frequency characteristics and sound quality are obtained and which is made compact, and to provide a piezoelectric loudspeaker. SOLUTION: The piezoelectric vibration unit is constituted so that a piezoelectric vibrator 31 is housed in a first casing 32 and a second casing 33 and a first elastic body 34 and a second elastic body 35, which are different in hardness, are packed respectively in the casings. COPYRIGHT: (C)2008,JPO&INPIT
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