Prediction of Vocal Severity Within and Across Voice Types Fifty-one subjects representing diverse laryngeal etiologies recorded /a/ and /i/ to provide a study sample of 102 vowel sounds. Listeners categorized each vowel on the basis of four voice types (normal, breathy, hoarse, unclassified) and evaluated the degree of vocal abnormality on a 7-point scale. In addition to spectrographic noise ... Research Article
Research Article  |   June 01, 1987
Prediction of Vocal Severity Within and Across Voice Types
 
Author Affiliations & Notes
  • Virginia I. Wolfe
    Auburn University at Montgomery, AL
  • Thomas M. Steinfatt
    University of Miami, FL
Article Information
Research Articles
Research Article   |   June 01, 1987
Prediction of Vocal Severity Within and Across Voice Types
Journal of Speech, Language, and Hearing Research, June 1987, Vol. 30, 230-240. doi:10.1044/jshr.3002.230
History: Received March 7, 1985 , Accepted September 22, 1986
 
Journal of Speech, Language, and Hearing Research, June 1987, Vol. 30, 230-240. doi:10.1044/jshr.3002.230
History: Received March 7, 1985; Accepted September 22, 1986

Fifty-one subjects representing diverse laryngeal etiologies recorded /a/ and /i/ to provide a study sample of 102 vowel sounds. Listeners categorized each vowel on the basis of four voice types (normal, breathy, hoarse, unclassified) and evaluated the degree of vocal abnormality on a 7-point scale. In addition to spectrographic noise (SN) classification, several acoustic measures based on period variability were entered into a nmltiple regression analysis for the prediction of vocal severity across and within voice types. In general, spectrographic noise and curvilinear derivatives of the period standard deviation (PSD) provided the best predictions of disorder severity. Different variables were the major predictors for different voice types. Several variables used in previous studies were inefficient as predictors of severity.

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