Sound motion pictures : from the laboratory to their presentation (1929)

Record Details:

Title:
Sound motion pictures : from the laboratory to their presentation
Date:
1929
Publisher:
Garden City : Doubleday, Doran & Company, Inc.
Volume:
Sound motion pictures : from the laboratory to their presentation
Leaf #:
000126
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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106 SOUND MOTION PICTURES House plants, per cubic foot .0031 Seats, upholstered, depending on material and lining, per seat 1 .0 to 2.5 Seat cushions, cotton, covered with corduroy, per seat 2.16 Seat cushions, hair covered with canvas and light damask, per seat 2.27 Settees, upholstered in hair and leather, seat and back, per seat 3 . Wood seats, for auditoriums, per seat . 100 Table 4. Absorption Coefficients material 297 58 1 1,095 2,190 2,890 Glass 0.021 0.020 0.010 f-inch celotex .058 .056 .072 0.097 Celotex B .178 •399 •734 .708 Sound-absorbing tile No. 1 .079 .116 .401 •35 Same No. 2 .078 .127 .201 .213 Hair felt, one inch .330 .62 •94 .90 Brick .019 .019 .056 .021 Pine wood .012 0.009 .016 .016 .009 Oak wood .011 .007 .011 .006 .005 Akoustolith .301 •434 .380 .272 Brass .021 .015 .023 .004 .001 1-inch insulite .056 .102 .182 .256 .172 f-inch flax-li-num .229 .312 •503 .336 1 inch flax-li-num .182 .422 .456 .569 .407 To conclude, then: In planning an auditorium we must consider three factors — shape, size, and interior finish. As I said in discussing echo, the design of an auditorium should avoid curved walls or ceilings. An attempt to introduce such features for their artistic effect is almost certain to be detrimental to the acoustic quality of the room. Auditoriums of a rectangular shape have been the most uniformly satisfactory. Prior to Sabine's work there was current an idea that there should be a certain ratio existing in the dimensions