microphone

n. device which converts sound waves into electronic signals for recording and amplification or broadcast.

A microphone, sometimes referred to as a mike or mic (both IPA pronunciation: ), is an acoustic to electric transducer or sensor that converts sound into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as ultrasonic checking.
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Noun
1. device for converting sound waves into electrical energy
(synonym) mike
(hypernym) electro-acoustic transducer
(hyponym) bug

n. microphone, device which converts sound waves into electronic signals for recording and amplification or broadcast.

(n.)
An instrument for intensifying and making audible very feeble sounds. It produces its effects by the changes of intensity in an electric current, occasioned by the variations in the contact resistance of conducting bodies, especially of imperfect conductors, under the action of acoustic vibrations.