F. H. Richardson's bluebook of projection (1942)

Page scan 000596 from F. H. Richardson's bluebook of projection

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1942
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000596
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Date Added:
May 02, 2025
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580 RICHARDSON'S BLUEBOOK OF PROJECTION central bank of loudspeakers, the other drives (through two other amplifiers) the two wing speaker banks. (13) The fact that there are three separate control 50 MlLL "■ -<jOMIU. I TBAl*-PlftLCKb'r7~T~\ '«2 TKACKl &FF SOUhP TgAQC PEC . ^T^ ^T, . PdAL CELL 1 FREQUENCY J r CONTROL TQKHC COWttOL TRMK PK Fig. 217. — Schematic diagrams of stereo-control system and tracks frequencies, instead of only one as in the system of Fig 216, means that the volume of each of the three banks of speakers can be controlled individually. Hence, sound can be made to originate at either side of the screen, and move across the screen in either direction. The system falls short of perfect stereophonic results only in that the two wing speaker banks derive their sound from the same soundtrack, and therefore cannot be made to reproduce two different sounds simultaneously. The system has all the advantages of increased volume range. (14) More elaborate and picturesque results are obtainable with the use of a control film instead of a control track. Such a film is depicted in Fig. 218. It is a normal-width, 35 mm film, but carries no pictures, only