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Today is November 21 - the day Thomas Edison announced the invention of the phonograph
The phonograph was the first device for recording and reproducing sound.
Invented by Thomas Edison, presented on November 1877, 21.
The working principles of the Edison phonograph were studied experimentally as early as 1857.
Edison's desire to create such a device was his desire to record telephone conversations at his Menlo Park laboratory.
Once on the telegraph repeater, he heard sounds that resembled unintelligible speech.
However, the invention was so successful that in 1906, Edison released to the public several musical and theatrical recordings made by the National Phonograph Company.