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 #:
000630
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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June, 1930] L,OUD SPEAKERS AND SOUND REPRODUCTION 613 Each loudspeaker was placed on the ground out of doors pointing directly upward and at a sufficiently great distance from buildings so that reflections from these did not affect the results obtained. A condenser microphone was suspended directly above the center of the loudspeaker mouth at a distance of 20 feet. (See Fig. 2.) The FIG. 2. Setup to determine frequency response characteristics of speaker for higher frequencies. condenser microphone was connected to a sound amplifier. The entire sound measuring equipment was corrected electrically so as to possess a uniform over-all frequency characteristic. The frequency-response characteristics obtained in this manner are