A microphone (colloquially called Mic or Mike [both pronounced / ˈmaɪk / (Mike)]) is an acoustic-to-electrical transducer (ecn: Transducer) or sensor, which converts sound into an electrical signal. Does. In 1876, Emily Berliner (en: Emile Berliner) invented the first microphone, which was used as a telephone voice transmitter. Microphones are used in many applications, such as telephones, tape recorders, karaoke systems, hearing-aid devices, the making of movies, live and recorded audio engineering, FRS radio, megaphone, radio and television broadcasting and voice recording in computers, voice recording For identification, VoIP and some...