Adafruit
Electret Microphone - 20Hz-20KHz Omnidirectional
This electret capsule microphone is the same one we use in our great microphone amplifier board. It contains a small vibrating element that will output...
This electret capsule microphone is the same one we use in our great microphone amplifier board. It contains a small vibrating element that will output a few milllivolts peak-to-peak. You will need an op-amp to amplify the signal, some chips are designed with the amplifier built in in which case you can wire it up directly.
This is an "omnidirectional" microphone, with -44dB sensitivity, and has 20-20KHz frequency response. You can plug it into a breadboard or perfboard or solder wires to the little wires sticking out the back.
Check out OpenMusicLab's great tutorial on Electret Microphones for a deeper look at how these sensors work. If you need an amplifier board, see our fully-assembled and tested mic amp board with adjustable gain.
Jargon buster
Plain-language definitions for the technical terms used above.
- Op-amp
- An op-amp, or operational amplifier, is a chip used to amplify, buffer, or compare analogue signals. Resistor values around an op-amp help set gain and input behaviour, so choosing the right resistance matters for stable circuit performance.
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