A wireless microphone, as the name implies, is a microphone
without a physical cable connecting it directly to the sound
recording or amplifying equipment with which it is associated. Also
known as a radio microphone, it has a small, battery-powered
radio transmitter in the microphone body, which transmits the audio
signal from the microphone by radio waves to a nearby receiver
unit, which recovers the audio. The other audio equipment is
connected to the receiver unit by cable. Wireless microphones are
widely used in the entertainment industry, television broadcasting,
and public speaking to allow public speakers, interviewers,
performers, and entertainers to move about freely while using a
microphone to amplify their voices.
