Sparkfun

Electret Microphone

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SKU:
PPCOM-08635
  • Electret Microphone main
  • Electret Microphone
  • Electret Microphone
  • Electret Microphone 1
£1.25

Description

Electret Microphone

An Electret Condenser Microphone is a type of transducer that is used to detect or measure sound signals. It is used in noise detectors and sound recorders etc. It is essentially a parallel plate capacitor in which one plate is fixed and the other is movable (diaphragm) with a very small gap between them. When a sound wave strikes the diaphragm, it starts moving which changes the capacitance of the capacitor and causes a variable current to flow. This variable current is then filtered and processed to get the sound you want to record.
 
Also available all mounted with supporting circuitry on a breakout board, to easily add it to your project

Documents:

Since the datasheet isnt super clear, this polarity of microphone is important (it matters which way around you wire it). Think of it like an electrolytic capacitor - you measuring the change in capacitance when the mic detects sound
If you look at the back of the microphone you will see 2 pins. One of them looks like it is not connected to anything - that is the signal output pin. The other pin has 3 connections coming out connecting that pin to the metal case, that's the ground.
 

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Additional Information

Brand:
SparkFun
Part Number:
COM-08635
Barcode:
5055421008024
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