| 摘要 |
A piezoelectric loudspeaker comprises a support member having an opening therethrough in which is disposed a circular piezoelectric vibrator. The vibrator is secured at its periphery to the support member so as to be vibrationally driven in response to a driving signal applied thereto. A sound-producing vibratable member is secured at its periphery to the support member and is coupled to the piezoelectric vibrator at a central circular region which is concentric with the vibrator. The piezoelectric vibrator and the vibrating member are coupled together by means of a cylindrical coupling member which effectively transmits the vibrational movement of the vibrator to the vibratable member to effect vibration of the vibratable member over a wide frequency range including the low end of the audible range to produce a corresponding wide range of acoustic sounds.
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