How to add sound to amateur films (1954)

Record Details:

Title:
How to add sound to amateur films
Date:
1954
Publisher:
London : Focal Press
Volume:
How to add sound to amateur films
Leaf #:
00049
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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Amplifier Film leaving the gate of an optical sound projector passes round a sound scanning drum coupled to a heavy flywheel to ensure smooth rotation. A pressure roller prevents the film from slipping on the drum and a sprung damping roller provides a constant driving tension irrespective of any "snatch" from the teeth of the sprocket pulling the film. An exciter lamp and lens system project a fine slit of [light on to the sound track and the transmitted light falls on a photo-cell inside the sound drum. The photo-cell is connected to an amplifier operating a loudspeaker by the screen. projectors are widely used by amateurs as well as by professionals. The films used on them are recorded almost exclusively by professionals, however. This is because the production of an optical sound track requires elaborate apparatus beyond the resources of most amateurs. On the other hand, there are commercial concerns prepared to make the necessary recordings to order and an increasing number of amateurs are availing themselves of their services. The quality of the sound you can get from an optical recording on 16-mm. film depends on the excellence of the 45