moving-coil microphone

A moving-coil microphone is one of two main types of dynamic microphone and the most commonly used microphone for live performances. Moving-coil microphones use a magnet, a coil wrapped with wire and a diaphragm that sits over the top of both the magnet and the coil. Sound waves cause the diaphragm to move, and in turn, the attached voice coil moves, translating its motion into an electrical signal.