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

Nearby words

  1. carbon disulphide,
  2. carbon fiber,
  3. carbon fibre,
  4. carbon fixation,
  5. carbon footprint,
  6. carbon monoxide,
  7. carbon monoxide hemoglobin,
  8. carbon monoxide poisoning,
  9. carbon nanotube,
  10. carbon neutral

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