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Electret Condenser Microphone

Can you hear me? Check out these cheap mics. Find them at digi-key, adafruit, sparkfun, or hands-free ear pieces. You will need to amplify the signal to read it in a micro-controller like arduino. Check out our ear-shaped amplifier breakout board tutorial. The mic will give you the present value of the sound wave. If you want to know the amplitude or volume, store some values in a buffer and find the variance or range of the buffer.
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