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 ...

This article proposes a compact ELF transmitter based on a heterogeneous architecture of piezoelectric cantilevers and oscillating electret, as well as a relevant information transfer program. The ...

Electret condenser microphones (ECMs) are widely used in audio applications due to their small size, low cost, and high sensitivity. They operate using a permanently charged diaphragm and backplate, ...