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

Page scan 000523 from Journal of the Society of Motion Picture Engineers

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 #:
000523
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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Screen Figure 2. Screen acceptable synchronization throughout the 224-ft area. Uniform Sound Level Uniform sound level for all parts of the arena was obtained by appropriate distribution of the loudspeaker units and by carefully adjusting their beam direction. Each of the loudspeaker units consisted of two groups of three speakers of different frequency characteristics. Numerous tests showed that the most suitable arrangement was obtained with the loudspeaker units placed on both sides of the screen (Fig. 1) at about two-thirds of its height.* A great many tests and measurements were necessary to obtain the correct adjustment of the sound direction for all the loudspeaker units. The final result of the measurement of the sound levels may be seen in Fig. 3. With an average * This distance was determined by the structure of the Waldb"hne Berlin and must not be assumed to be generally acceptable. 514 December 1952 Journal of the SMPTE Vol. 59