Abstract
30 subjects, 15 males and 15 females, ranging in age from 18-42 with a mean of 25 years all untrained in singing, sang up the musical scale on vowels (a)[image] and hummed upward and downward over their vocal ranges including falsetto. For 29[1959] HUMAN BIOLOGY 363-375 each note fundamental frequency and relative sound measurements were made. There was little consistency in sound level versus frequency patterns for the scales. Among 5 scales produced by each subject there was little consistency in pattern of sound level variation. 30 trained judges were in poor agreement. Judgment of loudness variations by observers do not support clinical techniques of determining optimum pitch levels for individuals.
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