Carbon microphone
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The carbon microphone, also known as carbon button microphone, button microphone, or carbon transmitter, is a type of microphone, a transducer that converts sound to an electrical audio signal. It con
Carbon microphone from Western Electric telephone handset, around 1976.
A disassembled Ericsson carbon microphone with carbon particles visible
Hughes carbon microphone
Reginald Fessenden
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Reginald Aubrey Fessenden was a Canadian-American electrical engineer and inventor who received hundreds of patents in fields related to radio and sonar between 1891 and 1936.
Fessenden in 1903
Whitney Institute in Bermuda, founded in 1881, of which Fessenden was headmaster
Located near Fessenden's birthplace, this plaque was installed by the Historic Sites and Monuments Board of Canada
It reviews his telecommunications and submarine detection work