User's Manual

GE864- QUAD Har dwar e User Guide
1vv0300872 Rev.1 2010-04-02
- All Rights Reserved. Page 58 of 77
12.8. Magnetic Buzzer Concepts
12.8.1. Short Description
A magnetic Buzzer is a sound- gener ating device with a coil located in the magnetic
circuit consisting of a permanent magnet, an iron cor e, a high permeable metal disk,
and a vibrating diaphragm.
Drawing of the Magnetic Buzzer
The disk and diaphr agm are attracted to the core by the magnetic field. When an
oscillating signal is moved through the coil, it produces a fluctuating magnetic field,
which vibrates the diaphr agm at a frequency of the drive signal. Thus the sound is
pr oduced relative to the frequency applied.
Diaphr agm movement