Buzzers - Electronic Parts Sourcing

What is a Buzzer?
 
A buzzer is an audio signalling mechanism that can be electromechanical, piezoelectric, mechanical, etc. Some examples of buzzers in common day applications include beepers, alarm clocks, timers, doorbells, and confirmation devices. The buzzer was first introduced in 1831 by Joseph Henry who implemented the buzzer’s use in doorknobs. Eventually piezoelectric buzzers entered the market, the products of which dominated the market.
 
Types of Buzzers
 
There are many different types of buzzers, which include but are not limited to the electromechanical, mechanical, and piezoelectric. Starting with the piezoelectric, this buzzer type can be driven by an oscillating electronic circuit or other audio signal source. For piezoelectric, the sounds that are used to indicate that a buzzer has been pressed is a ring, click or beep. As for the second element, the mechanical element, a buzzer is a good example of what a typical mechanical buzzer looks and sounds like. Finally, there is the electromechanical type, which is based on early devices identical to an electric bell without a metal gong.
 
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