Day in Tech History

Day in Tech History


January 17: Carbon Microphone for Telephone

January 17, 2013

Thomas Alva Edison


1882 - Thomas Edison created more tech history when he was granted a patent for the carbon microphone for the telephone. The carbon was in between two cups and attached to the mouthpiece. The diaphragm would change pressure, causing the carbon to be pushed upon. That would send electric current to the other end – which would transpose it back to audio.Wikazine – Full show notes for January 17


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