Phonautograph (c 1857) apparatus for studying sound vibrations graphically, invented by (Edouard) Leon Scott de Martinville. Vibrations produced in cone traced on lamp blacked cylinder. Engraving, ...
KANSAS CITY, Mo. (KCTV) - December 24, 1877. Thomas Edison files a patent for the first phonograph capable of recording and playing sound. The groundbreaking product was a byproduct of Edison’s work ...
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