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+---- Thread: Net Report May 3rd 2023 (/showthread.php?tid=969)
Net Report May 3rd 2023 - Bernie ve3bqm - 2023-05-03
Net control Ve3BQM Topic: Microphone
What is the original microphone?
The crude carbon rod microphone was invented by David Edward Hughes in 1878 and was instrumental in the development of telephony. These devices used the variable electrical resistance of carbon under pressure between metal plates to translate airborne sound waves into an electrical signal.
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