Summary
Purpose
The present study aimed to determine whether there were physiological differences
in the vocal fold vibration between nonfatigued and fatigued voices using high-speed
laryngoscopic imaging and quantitative analysis.
Methods
Twenty participants aged from 18 to 23 years (mean, 21.2 years; standard deviation,
1.3 years) with normal voice were recruited to participate in an extended singing
task. Vocal fatigue was induced using a singing task. High-speed laryngoscopic image
recordings of /i/ phonation were taken before and after the singing task. The laryngoscopic
images were semiautomatically analyzed with the quantitative high-speed video processing
program to extract indices related to the anteroposterior dimension (length), transverse
dimension (width), and the speed of opening and closing.
Results
Significant reduction in the glottal length-to-width ratio index was found after vocal
fatigue. Physiologically, this indicated either a significantly shorter (anteroposteriorly)
or a wider (transversely) glottis after vocal fatigue.
Conclusion
The high-speed imaging technique using quantitative analysis has the potential for
early identification of vocally fatigued voice.
Key Words
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Article info
Publication history
Published online: September 05, 2013
Accepted:
June 13,
2013
Identification
Copyright
© 2013 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
