Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000208
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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Sept., 1944 RERECORDING CONSOLE, CIRCUITS, AND EQUALIZERS 197 cuit into ^everal, or joining several into one on a matched impedance basis at all connecting points. The transmission loss is the minimum that can be obtained from any passive circuit arrangement effecting the. same result. When used with the console mixer circuit patching points are made available on a group basis at a number of places, thus greatly facilitating the use of the mixer networks. Constant B Equalizers. — In the engineering of these new mixing facilities one of the worth-while features was the design of a new electrical circuit for the variable-type equalizers, resulting in im FIG. 9. Conventional equalizer characteristics. proved equalization characteristics for the different control steps. These networks are termed "Constant B Equalizers" for reasons which will be evident later. The design methods employed are an extension of the theory presented in the book, Motion Picture Sound Engineering, and where possible the same notation and concepts are used. It is believed that the constant B equalizer design is a new solution to the variable equalizer problem. Variable networks used in rerecording rooms are almost exclusively of the constant resistance type where present-day design technique permits. This provides flexibility of circuit patching. For wave filters this feature is not fully realizable for technical reasons, but for