Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000354
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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334 CINEMATOGRAPHIC ANNUAL from one stage to another through the solid members of the structure. The most feasible means of preventing the transmission of solid borne vibrations is to support the building or room or equipment which is to be insulated upon flexible supports. The problem is one which lends itself to quantitative formulation, which can be solved by methods analogous to electric circuit theory. From a practical standpoint, rubber and cork are among the best materials for providing such insulation. The room or object to be insulated should rest upon a flexible support, and the natural period of the object on its flexible support should be low in comparison with all frequencies which are to be insulated. In general, ordinary heat insulation cork loaded to about six or eight pounds per square inch or machinery insulation cork loaded to about twenty to forty pounds per square inch will provide effective insulation against audio frequency vibrations.