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Basic knowledge of Piezoelectric Sound Components
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.
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 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.
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