carbon microphone


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Related to carbon microphone: movie camera, mimeograph

carbon microphone

n
(Electrical Engineering) 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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He moved back toLondonin 1857 where he created a carbon microphone while trying to make improvements to the recently invented telephone.
Was it the light bulb, the modern bagless vacuum cleaner or the carbon microphone? You can find out whether the circular saw was invented by a woman or a man and read about explorer robots.
The previously mentioned David Edward Hughes invented the printing telegraph system (teleprinter) in 1856-59, and the carbon microphone vital to telephony and broadcasting in 1877.