I wonder if common electret microphones are frequency mixers. That is, say, when two signals pass through the diaphragm, will two new signals f1 + f2 and f1 – f2 be produced if the sound pressure is around 70-80dB-spl? If they are, how significant are the two signals – will the power levels be roughly the same as the input?
Electronic – Are electret microphones frequency mixers
microprocessormixer
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Best Answer
No, at that SPL, the microphone will be operating linearly, and not producing any significant harmonics or intermodulation products.