He invented the earliest known sound recording device, the phonautograph, which was patented in France on 25 March 1857.
12.
The phonograph's predecessors include �douard-L�on Scott de Martinville's phonautograph, and Charles Cros's paleophone.
13.
Despite the similarity of name, there is no documentary evidence that Edison's phonograph was based on Scott's phonautograph.
14.
Recordings made with the phonautograph were intended to be visual representations of the sound and were not to be reproduced as sound until 2008.
15.
In 1857, �douard-L�on Scott de Martinville invented the phonautograph, the first device that could record sound waves as they passed through the air.
16.
It has been claimed that in 1863 Scott's phonautograph was used to make a recording of Abraham Lincoln's voice at the White House.
17.
No travel was required for the phonautograph, which had been in a science museum warehouse in Mexico City, where it had been stored for 50 years.
18.
Curiously, at the time Leon Scott invented his phonautograph, he had devised a way only to make a visual record of a voice, but not to reproduce the sound.
19.
Ten years later, the early experiments of Emile Berliner, the creator of the disc Gramophone, employed a recording machine which was in essence a disc form of the phonautograph.
20.
The phonautograph used a horn to collect sound, attached to a diaphragm which vibrated a stiff bristle which inscribed an image on a lamp black coated, hand-cranked cylinder.
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