How did the receiver apparatus manage to recreate the sound originally spoken into the transmitter?
Answer
The incoming current pulsed an electromagnet, moving a second diaphragm to push surrounding air
The modulated incoming current flowed through an electromagnet near a second diaphragm (often thin iron). The varying magnetic pull caused this diaphragm to rapidly move in and out, recreating the original sound waves in the air.
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Alexander Graham Bell's Telephone Prototype | Earth Science
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