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Piezoelectric Sounder

A piezoelectric diaphragm is incorporated in a plastic case (resonator). The diaphragm vibrates and produces sound due to an external signal.

Piezoelectric Diaphragm

The Piezoelectric element is bonded to a metal plate.
Below are 2 examples of types of usage. The shape of the electrode will differ accordingly.

  • External drive type (vibrates and makes sound via external signal)
    → Full electrode
  • Self-drive type (when a certain voltage is applied, it vibrates and makes a sound)
    → Divided electrode (with feedback electrode)