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All photographs by Paul Thompson
Dr. DeForest had several problems to overcome. Nothing but a standard cinematograph film could be used. The speed had to be that of the standard motion-picture film, The recording and reproducing devices had to be inertialess, except the diaphragm for receiving and the diaphragm for reproducing the sound. There were other handicaps too, all of which he has overcome
What appears to be an ordinary reel of film is threaded on a standard projector. There is no phonograph in sight even tho you might fancy that the sound would probably come from somewhere in the vicinity of the source of the picture — the projection machine
synchronize ! it was a ghostly rather than a ghastly failure, since any subsequent successes in the same direction must inevitably be built upon such valiant and noteworthy attempts as this and their heroic failures.
Poia Negri in "Bella Donna" was being run oft* when I entered the projection room and the Phonofilm operator informed me that his film would be run in just a few minutes. I expected to witness the setting up of some elaborate device. To tl>e contrary, what appeared to be an ordinary reel of film was threaded up on a standard projector. There was no phonograph in sight, tho I had fancied that the sound would probably come from somewhere in the vicinity of the source of the picture— the projection machine. But absolutely nothing extraordinary happened in the projection room, so I hurried down the iron ladder into the gorgeous auditorium again to witness and listen to (Continued on page 93)
Chart illustrating the method of reproducing the moving picture and sound waves (music or voice) registered on the same moving-picture film. Two different parts of the same film are used simultaneously in the reproducing process of the Phonofilm projector, which is an ordinary moving-picture projector with a special attachment for the sound cell. The fine photographic markings on the edge of the moving-picture film where the sound record is recorded control the amount of light thrown upon the photo-electric cell which thus translates light waves back into electric vibrations, afterward amplified by. means of audion lamps and light speakers
f.
Theaters that the Edison device was tried out, ten or more years ago. In that instance, a phonograph was attached to the Edison model projection machine of that day. Taking of the picture and taking of the voice were two separate processes, or at any rate, the exhibition resulted in two separate and indistinct expressions. ( ine got the impression that one person was doing the acting and another person was doing the talking for him — not to the audience, hut in a phonograph. The breakdown of any approach towards realism and realization of art was chiefly due to the fact that sound and action failed to 40 se.
Sound record of the vowels as registered h> the new invention of Dr. Lee DeForest — The Phonofilm. (sound waves enlarged 500 times! Taken from the edge of an ordinary eniul>ion film used simultaneously in recording pictures as well asound
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