If the Lincoln phonautograph session actually took place, and the cylinder wasn't inadvertently tossed in the trash by a janitor, Koenigsberg said, one of the most likely places for it to be would be in the White House archives.
32.
The first device that could record actual sounds as they passed through the air ( but could not play them back the purpose was only visual study ) was the phonautograph, patented in 1857 by Parisian inventor �douard-L�on Scott de Martinville.
33.
Many pioneering attempts to record and reproduce sound were made during the latter half of the 19th century notably Scott's Phonautograph of 1857 and these efforts culminated in the invention of the phonograph, patented by Thomas Edison in 1877.
34.
Several other inventors subsequently produced modified versions of the phonautograph and recorded the sound-modulated line by the use of various implements and in various formats, either in attempts to improve on Scott's apparatus or to adapt it to specific applications.
35.
By mid-April 1877, Charles Cros had realized that a phonautograph recording could be converted back into sound by photoengraving the tracing into a metal surface to create a playable groove, then using a stylus and diaphragm similar to those of the phonautograph to reverse the recording process and recreate the sound.
36.
By mid-April 1877, Charles Cros had realized that a phonautograph recording could be converted back into sound by photoengraving the tracing into a metal surface to create a playable groove, then using a stylus and diaphragm similar to those of the phonautograph to reverse the recording process and recreate the sound.
37.
After Bell and Watson discovered on June 2, 1875, that movements of the reed alone in a magnetic field could reproduce the frequencies and timbre of spoken sound waves, Bell reasoned by analogy with the mechanical phonautograph that a skin diaphragm would reproduce sounds like the human ear when connected to a steel or iron reed or hinged armature.
38.
If a greatly enlarged image of a segment of a phonautograph tracing were projected as a horizontally-oriented undulating line on a sheet of graph paper, a numerical description of the line could be created by proceeding from one grid column to the next, counting the number of squares between the line and a straight horizontal reference line, and making a list of the numbers.
39.
In addition to Scott's phonautograph, Koenigsberg, 56, owns one of Edison's first phonographs, which recorded on tinfoil ( he also has a piece of the original foil from that machine ); one of the first Edison talking dolls; one of the first jukeboxes; an 1898 talking alarm clock ( it speaks in French ); daguerreotypes of Lincoln, John Quincy Adams and Dolly Madison; a lithograph of a woman listening to a stereo telephone broadcasting service, a 19th-century variant of cable television called the Theatrophone, as well as a recording of Edison receiving the Congressional Medal of Honor in 1928.
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