If that capacitance is incorporated into an RC circuit with a very high impedance ... wdwd [CC BY 3.0] The electret condenser microphone that I bought for pennies is a capacitor microphone ...

The entirety of the build is minimal, consisting of a GY-MAX4466 electret microphone module, a KY-040 encoder for some user control and an ESP32 attached to a Neopixel strip. The only additional ...