Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000430
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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410 CINEMATOGRAPHIC ANNUAL occurs in speech and also how long it is sustained when it does occur. The high maximum is brought about mainly by the fundamental tones of the voice. Since the fundamental occurs in all of the vowel sounds, and since the vowel sounds are gen .oa .024 .020 .06 .012 .008 .004 1 /" if ENERGY FREQUENCY DISTRIBUTION OP AVERAGE SPEECH THE SPEECH POWER CARRIED BT THE FREQUENCY REGION BETWEEN n,& n2 IS /^E^dn ^ 1, /\* v { / X / \ \ \ Ai / x/: 500 1,000 V500 2,000 2,500 FREQUENCY n FIGURE 1 10 9 8 7 b| 3,000 3,500 4,000 erally held longer than the other speech sounds, it is seen that a large contribution to this high maximum is brought about by the time factor rather than the intensity factor. Dr. Knudsen also discussed the curve shown in Fig. 2, in which the ordinate shown at the right hand of the curve, represents sensation units expressed in decibels, while the abscissas represent frequency or pitch. The lower line of the curve represents the threshold of audibility, while the upper line represents the intensity at which the sound becomes physically painful. The useful range between these two curves is of the order of 100 to 120 sensation units. It would appear at first sight, that the recording system, which covers a range of approxi