The talkies (1930)

Record Details:

Title:
The talkies
Date:
1930
Publisher:
London: Crosby Lockwood and Son
Volume:
The talkies
Leaf #:
000169
Language:
English
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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THE TALKIES 107 Some of the earlier workers were inclined to believe that the noise was due to optical irregularities in the actual celluloid film "base" before any light-sensitive emulsion was put on. A series of experiments was carried out on several kinds of film base besides that normally used for cine work. One of these experiments was to run various samples of film "base" through a sound projector in the usual manner. The results obtained by various observers showed that the earlier theories were not correct, and that the trouble was not in the material of the base. It was found, however, that a considerable amount of noise was introduced if finished film was run through the projector a few times, and that it was rendered more noisy still by being handled with bare fingers. The next step was to determine how much, if any, "background noise" was increased by the several steps involved in manufacturing the film, and in the ultimate processes of developing, fixing, washing, and drying. The method in this experiment was to run a sample of film through a standard sound-projector and measure electrically the power output of the film. If the film is optically true, the power output