Telephone (Alexander Graham Bell)

The device that transmits human voice as electrical signals was invented by Bell in 1876.

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Bell

telephone

telephone set

transmitter unit

sound

receiver unit

industrial revolution

patent

telecommunication

telephone call

telephone connection

Alexander Graham Bell

United States of America

USA

transmitter

electromagnet

electricity

device

inventor

physics

sound quality

apparatus

diaphragm

microphone

invention

history of technology

history

history of science

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