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

Page scan 00032 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 #:
00032
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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Jan., 1936] REPORT OF SOUND COMMITTEE 27 terms of the SMPE Primary Standard, and note again the readings at the various frequencies. To determine the deviation of the recording characteristic from that of the privately owned test-film at any frequency, subtract the output read on the test-film from the average of the output readings on the specially recorded film, taking particular notice of the algebraic sign. That is, if the newly recorded film gives an output at any frequency greater than that of the test-film, the deviation is plus; if the output is less, the deviation is minus. Next, refer to the calibration of the test-film (or Secondary Standard) in terms of the SMPE Primary Standard; and for every frequency add the deviation of the test-film from the SMPE Primary Standard to the deviation of the newly recorded film from the testfilm. These are the data desired by the Sound Committee. As an example : At 500 cycles, the newly recorded film gives an average output reading of -f-2 db. The test-film gives an output reading under similar conditions of +1 db. Therefore, the deviation of the newly recorded film from the test-film is -f-1 db. If the previous calibration of the test-film showed, at this frequency, a deviation from the SMPE Primary Standard of — 3 db. Then the recording characteristic of the system deviates from the SMPE Primary Standard by — 2 db. M. C. BATSEL R. M. EVANS L. G. GRIGNON E. H. HANSEN J. P. LIVADARY P. H. EVANS, Chairman C. DREHER, ViceChairman W. C. MILLER K. F. MORGAN W. A. MUELLER L. L. RYDER O. SANDVIK E. I. SPONABLE R. O. STROCK S. K. WOLF W. WOLF REFERENCE 1 Report of the Sound Committee. /. Soc. No. 4, p. 353. Mot P*rt En?., XXV (Oct., 1935),