| 摘要 |
PURPOSE: A sound converting apparatus using a piezoelectric driver is provided to play a high range sound and a low-midrange sound by overcoming frequency playable by previous piezoelectric speaker. CONSTITUTION: A vibration plate(220) is physically combined with a main piezoelectric driver(210). A supporting unit(230) supports at least one of the main piezoelectric driver or the vibration plate in a one-fixed point located inner side than the circumference of the main piezoelectric driver. Ae housing(290) accommodates the main piezoelectric driver and the vibration plate. An amplifier unit increases amount of movement of the supporting unit by corresponding to an operation of the main piezoelectric driver between the supporting unit and the housing. The circumference of the main piezoelectric driver and the vibration plate vibrates to free boundary around the fixed point.
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