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 #:
000270
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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246 SOUND MOTION PICTURES Studies on the wave forms of speech sounds have shown that the pitch of a man's voice is of an order of 128 cycles per second, that of woman's voice that of an order of 256 cycles. In each overtones of the fundamental cord tone occur. Such studies have indicated that frequencies of as high as 8,000 or 9,000 cycles exist in different speech sounds. In general, woman's speech is more difficult to FIG. IO. CHART OF PRESSURE AND FREQUENCIES REGISTERED BY EAR interpret than man's and has only one half as many tones as man's. The greatest differences occur in the case of the more difficult consonant sounds, which in woman's speech are not only fainter but require a higher frequency range for interpretation. The range from 3,000 to 6,000 cycles of a man's voice corresponds approximately to the range from 5,000 to 8,000 cycles for woman's voice. Since the ear is less sensitive at higher frequencies and the sounds are fainter, their difficulty of interpretation is proportionately greater. It can readily be understood that this difficulty of interpretation requires special attention on the part of the director and his technical staff.