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carbon microphone

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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You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
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Words nearby carbon microphone

carbonium, carbonium ion, carbonization, carbonize, carbonless paper, carbon microphone, carbon monoxide, carbon monoxide hemoglobin, carbon monoxide poisoning, carbonnade, carbon nanotube
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