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An AKG C214 condenser microphone with shock mount
A Sennheiser dynamic microphone

A microphone, colloquially mic or mike ({{#invoke:IPAc-en|main}}),<ref>{{#invoke:citation/CS1|citation |CitationClass=news }}</ref> is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. Electromagnetic transducers facilitate the conversion of acoustic signals into electrical signals.<ref>F. Rumsey & T. McCormick,2009, Sound and Recording, Elsevier</ref> Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, two-way radios, megaphones, radio and television broadcasting, and in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic checking or knock sensors.

Most microphones today use electromagnetic induction (dynamic microphones), capacitance change (condenser microphones) or piezoelectricity (piezoelectric microphones) to produce an electrical signal from air pressure variations. Microphones typically need to be connected to a preamplifier before the signal can be amplified with an audio power amplifier and a speaker or recorded.


Microphone sections
Intro  History  Components   Varieties    Capsule design and directivity   [[Microphone?section=_{{safesubst:#invoke:anchor|main}}Microphone_polar_patterns_| {{safesubst:#invoke:anchor|main}}Microphone polar patterns ]]   Application-specific designs    Powering    Connectors    Measurements and specifications    Measurement microphones    Microphone array and array microphones    Microphone windscreens    See also    Notes   References  External links  

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