carbon microphone
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noun
a microphone in which a diaphragm, vibrated by sound waves, applies a varying pressure to a container packed with carbon granules, altering the resistance of the carbon. A current flowing through the carbon is thus modulated at the frequency of the sound waves
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Words nearby carbon microphone
Carboniferous, carbonium ion, carbonization, carbonize, carbonless paper, carbon microphone, carbon monoxide, carbonnade, carbon nanotube, carbon neutral, carbon-nitrogen cycle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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