| 摘要 |
A piezoelectric vibrator for regenerating sound, and a piezoelectric panel speaker and a piezoelectric earphone having the same are provided to improve the ability of reproducing low-pitched sound by using a multiple layer piezoelectric material. A piezoelectric vibrator includes a piezoelectric actuator(110) for converting an electric signal into a mechanical vibration to reproduce sound. The piezoelectric vibrator has two or more laminated piezoelectric actuators each having elastic material(110b) and piezoelectric material(110a) attached to one side or both sides of the elastic material. A sound absorption material(130) is interposed between the laminated piezoelectric actuators. The elastic material contains one or more selected from a group consisting of copper, tungsten, aluminum, and alloys thereof. |
