Sound Components (Buzzer)Type of piezoelectric sound component

Basic knowledge of Piezoelectric Sound Components

Piezoelectric Diaphragm

Piezoelectric Diaphragm is a piezoelectric ceramic disk adhered to a metal plate of brass or nickel-alloy. Diaphragms can be classified into below two types. The electrode pattern of External Drive Type and Self Drive Type is different.

  • External Drive Type (produce sound by inputting signals from outside and oscillating) → does not have a feedback electrode.
  • Self Drive Type (produce sound by applying voltage directly and oscillating by itself) → has a feedback electrode.
Piezoelectric Diaphragm

Piezoelectric Sounder

Piezoelectric Sounder is a piezoelectric diaphragm assembled in a plastic case (Resonant cavity) and is classified into External Drive Type and Self Drive Type.

Piezoelectric Sounder

Piezoelectric Buzzer

Piezoelectric Buzzer is a self drive type piezoelectric sounder with built-in oscillation circuit. It generates consistent single tone sound just by applying D.C.voltage.

Piezoelectric Buzzer

Murata's Sound Components(Buzzer)