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 #:
000272
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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248 SOUND MOTION PICTURES lips of players acting as reeds, as with the horns. Each class may be further subdivided into melody and harmony instruments. In the former one note is usually produced at a time; in the latter several notes may be produced simultaneously. In general, harmony instruments are capable of producing notes of a much wider frequency range than melody instruments. Therefore a given type of instrument of the latter class may include several in 8 16 32 64 126 256 512 1024 204-8 4096 6192 16384 FREQUENCY QV. FIG. I I. CHART OF FREQUENCY RANGE struments, each covering different frequency ranges, such as the bass, tenor, and alto trombone. Experiments have indicated that notes of different frequency or pitch as produced by a musical instrument appear about equally loud to the ear. This similarity might be expected, since the ear has played an important part in their design. In Figure n contour lines of equal loudness are shown for the frequency range of from 32 to 4,000 cycles, which has been divided into three parts, the bass, the tenor or alto, and the soprano registers, corresponding to the notes produced by various instruments. The contour lines indicate that the notes of the lower registers have