loud-speaker

loudspeaker

[loud-spee-ker]
noun
1.
any of various devices, usually electronic, by which speech, music, etc., can be intensified and made audible throughout a room, hall, or the like.
2.
Audio.
a.
a device for transforming electric signals into audible sound, most frequently used to reproduce speech and music.
b.
speaker ( def 4 ).

Origin:
1880–85; loud + speaker

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
loudspeaker (ˌlaʊdˈspiːkə)
 
n
Sometimes shortened to: speaker, Also called: reproducer a device for converting audio-frequency signals into the equivalent sound waves by means of a vibrating conical diaphragm

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