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ther•mo•phone



Pronunciation: (thûr'mu-fōn"), Strict Standards: Non-static method FenSites::linkTo() should not be called statically in /site/html/dictionary/thermophone.html on line 73 [key]
n.
an electroacoustic transducer that forms sound waves by the expansion and contraction of the air adjacent to a conductor that varies in temperature according to the magnitude of the current passing through it; formerly used to calibrate microphones.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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