Birth of sound-on-film, 1922

Birth of sound-on-film, 1922

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Credit: EMILIO SEGRE VISUAL ARCHIVES/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: Birth of sound-on-film. Scene on 9 June 1922, in lecture room 100 of the Physics Laboratory at the University of Illinois at Urbana-Champaign, USA, when Polish-US engineer Joseph Tykociner (1877-1969) gave the world's first public demonstration of sound-on-film movies. This work replaced the old system of 'pictures on film, sound on phonograph discs'. Tykociner, the university's professor of engineering, is behind the desk, looking at the horn microphone. Beside him is the first sound-picture camera. At far right is the first sound-picture projector. Headphone (some hanging on the front of the desk) were used to listen to the sound.Restrictions:

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