≥100 dB @30cm
-40 ～ +85 ℃
-40 ～ +90 ℃
What is the difference between piezoelectric buzzer and electromagnetic buzzer?
Buzzer is divided into piezoelectric and electromagnetic two categories: piezoelectric buzzer mainly by multivibrator, piezoelectric buzzer, impedance matching and resonance box, shell and other components. It is based on the piezoelectric effect of piezoelectric ceramics, to drive the vibration of the metal sheet and sound; electromagnetic buzzer, it is the principle of electromagnetism, when the metal suction diaphragm electromagnetism suction, Elastic rebound.
Piezoelectric buzzer is driven by a square wave. The electromagnetic type is a 1/2 square wave drive. The piezoelectric buzzer needs a relatively high voltage to have enough sound pressure. The general recommendation is 9V or more. Piezoelectric some specifications, can reach more than 120dB, larger size is also very easy to reach 100dB.
Electromagnetic buzzer: With 1.5V can be issued more than 85dB sound pressure, the only current consumption will be much higher than the piezoelectric buzzer, and in the same size, the electromagnetic buzzer, the response frequency Can be done relatively low; electromagnetic buzzer pressure is generally up to 90dB. Mechanical buzzer is a small category of electromagnetic buzzer.