Added on Oct 14, 2011
Length: 02:28 | Comments: 0
Thomas Alva Edison conceived the principle of recording and reproducing sound between May and July 1877 as a byproduct of his efforts to "play back" recorded telegraph messages and to automate speech sounds for transmission by telephone.
The result was this invention, the Phonograph.
Channels: 1910s Technology
Tags: phonograph, invention, Thomas Edison, telegraph, telephone, recording sound, playback, hearing, audio, signal
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