Clinical Significance of AC/DC% in the Vocal Function Tests
1993 Volume 1993 Issue Supplement66 Pages 1-12
Details
1993 Volume 1993 Issue Supplement66 Pages 1-12
The rate of AC component to DC component of the expiratory flow rate during sustained phonation (AC/DC%) was studied to determine whether it can reflect the stiffness of the vocal folds.
In normal subjects, AC/DC% increased with intensity of phonation, which could be explained by changes in stiffness of the vocal folds.
AC/DC% reflected the stiffness of the vocal folds in pathological larynges.
AC/DC% was more sensitive to pathological changes in the vocal folds than was mean flow rate.
AC/DC% reflected some aspect of laryngeal efficiency.
