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microphone

[mahy-kruh-fohn] /ˈmaɪ krəˌfoʊn/
noun
1.
an instrument capable of transforming sound waves into changes in electric currents or voltage, used in recording or transmitting sound.
Origin of microphone
1875-1880
1875-80; micro-, in sense “enlarging” (extracted from microscope) + -phone
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for microphone
Contemporary Examples
Historical Examples
  • He picked up the microphone, polishing the words in his mind.

    Victory Lester del Rey
  • He hauled the microphone from its cubby in the dashboard and spoke the code words.

    Raiders Invisible Desmond Winter Hall
  • He tried the loud-speaker switches, then spoke into the microphone.

    The Flaming Mountain Harold Leland Goodwin
  • He thumbed down the communicator-button and spoke into a microphone.

    Pariah Planet Murray Leinster
  • When a microphone picked up a hostile gun explosion the disturbance was instantly transmitted through several miles of wire.

British Dictionary definitions for microphone

microphone

/ˈmaɪkrəˌfəʊn/
noun
1.
a device used in sound-reproduction systems for converting sound into electrical energy, usually by means of a ribbon or diaphragm set into motion by the sound waves. The vibrations are converted into the equivalent audio-frequency electric currents Informal name mike See also carbon microphone Compare loudspeaker
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for microphone
n.

1680s, "ear trumpet for the hard-of-hearing," coined from Greek mikros "small" (see mica) + phone "sound" (see fame (n.)). Modern meaning dates from 1929, from use in radio broadcasting and movie recording. Earlier, "amplifying telephone transmitter" (1878). Of the two spellings of the short form of the word, mike (1927) is older than mic (1961).

Online Etymology Dictionary, © 2010 Douglas Harper
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microphone in Technology

hardware, audio
Any electromechanical device designed to convert sound into an electrical signal.
A microphone converts an acoustic waveform consisting of alternating high and low air pressure travelling through the air into a voltage. To do this it uses some kind of pressure or movement sensor. The simplest kind of microphone is actually very similar in construction to a loudspeaker.
The analogue electrical signal can be fed into a computer's sound card where it is amplified and sampled to convert it into a digital waveform for storage or transmission.
(2002-11-04)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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19
22
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