Voice sounds were transmitted for the first ?
Voice sounds were transmitted for the first time on June 3, 1875 over this instrument invented by Alexander Graham Bell and Thomas Watson. The diaphragm was made of tightly stretched animal membrane, and powered with batteries it transmitted sounds over a
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10668212
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Mary Evans / Everett Collection
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Batteries Battery Diaphragm Firsts Invented Inventions Membrane Sounds Stretched Tightly Transmitted
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