Sparkfun BOB-12758 Expansion board 1 pc(s) Compatible with (development kits): Arduino

This small breakout board couples an electret microphone (100Hz-10kHz) with a 60x microphone preamplifier to amplify the sounds of speech, doors, door knocking or other loud sounds that can be recorded by a microcontroller's analogue-to-digital converter. Each breakout comes fully assembled and works from 2.7V to 5.5V.
The Electret Mic Breakout translates amplitude (not volume) by capturing sound waves between two conductive plates (one of them a vibration membrane and the other fixed) in the microphone and converting them into electric waves. These electrical signals are then amplified and recorded by the ADC of your microcontroller.

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