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At 20:50 8/11/00 -0400, Tom McCarthy wrote:
Hello all,
I have a question concerning the invention of the microphone and, its
inverse, the speaker. AG Bell invented the telephone, which I would think
would make him the inventer of the microphone. After doing a little
Thanks, as always for your knowledgeable replies.
Tom
The memorable "Mr. Watson come here..." was transmitted by a sender of
a later type: (Watson made this sender a month or so after the patent
filing - Bell was manually inept.)
It had an electrode dipping in a liquid to provide variable resistance
when vibrated with sound. This provided more signal than the feeble
moving iron type microphone.
The generalization of the trembling contact with many frictional
contacts in a carbon granule capsule was due to Edison
who was contracted to provide improvements to the microphone.
Very soon, pairs of telephone sets could be rented for points
approaching two miles distant.
brian whatcott <inet@intellisys.net> Altus OK
Eureka!