HOW TO CHOOSE AUDIO BUZZERS ?

Piezo Buzzer vs. Magnetic Buzzers

Magnetic Buzzer Structure

Piezo Trasducer & Piezo Buzzer Structure

Indicators vs. Transducers

Micro SMD Transducer

Buzzer's Usage
Buzzers are typically used for identification and alarm purposes across many major industries. Industries Served
  • Safety and Security
  • Automotive Electronics
  • Office Automation
  • Medical Equipment
  • Industrial
  • Consumer Electronics
Piezo Buzzer Characteristics
  • Wide operating voltage: 3~250V
  • Lower current consumption: less than 30mA
  • Higher rated frequency
  • Larger footprint
  • Higher sound pressure level
  • Piezo Buzzer
Magnetic Buzzer Characteristics
  • Narrow operating voltage: 1~16V
  • Higher current consumption: 30~100mA
  • Lower rated frequency
  • Smaller footprint
  • Lower sound pressure level
  • Magnetic Buzzer
Magnetic Buzzer Structure
This illustration highlights the structure of a typical magnetic buzzer. Like piezo technology, magnetic buzzers are available in transducer and indicator configurations. In a magnetic buzzer, the transistor acts as the driving circuit. Indicators include the transistor, creating a tone when a dc voltage is applied. Transducers lack this transistor, requiring a square wave signal to operate properly.
Name of Parts
1: Casing 2: Vibrating Weight 3: Cavity 4: Vibrating Disk 5: Magnet
6: Pole 7: Coil 8: Yoke Plate 9: PCB 10: Transistor 11:Epoxy 12: Pin
When an oscillating signal is moved through the coil, it produces a fluctuating magnetic field which vibrates the disk at a frequency equal to that of the drive signal.
 
here are two types of piezo buzzers - transducers and indicators. Transducers consist of a casing, a piezoceramic element and a terminal. In order to operate a transducer, the user must send a square wave signal to the buzzer. Indicators consist of a casing, a piezoceramic element, a circuit board and a terminal. In order to operate an indicator, the user must send the buzzer a specified DC voltage.
Piezo Audio Transducer
 
Piezo Audio Buzzer