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Vocal Fold Adjustment Caused by Phonation Into a Tube: A Double-Case Study Using Computed Tomography
Vít Hampala1, Anne-Maria Laukkanen2, Marco A Guzman3
1Department of Biophysics, Faculty of Science, Voice Research Lab, Palacky University, Olomouc, Czech Republic.
Journal of Voice : Official Journal of the Voice Foundation
|March 16, 2015
Summary
Resonance tube exercises did not show significant vocal fold changes in this study. Observed vocal fold variability was similar to natural fluctuations, suggesting limited impact on vocal fold configuration.
Area of Science:
- Vocal fold physiology
- Acoustic and aerodynamic voice analysis
Background:
- Phonation into a tube is a common vocal training technique.
- Anecdotal evidence suggests improved phonation ease and loudness post-exercise.
Observation:
- Computed tomography (CT) was used to measure vocal fold parameters before, during, and after tube phonation.
- Measurements included vertical thickness, bulkiness, length, and glottal width in two subjects.
Findings:
- No consistent, systematic changes in vocal fold configuration were observed across subjects after tube phonation.
- Vocal fold variability under experimental conditions was comparable to baseline variations.
Implications:
- Observed vocal fold changes are less prominent than vocal tract configuration changes reported in related studies.
- Further research may be needed to understand the precise biomechanical effects of resonance tube exercises on the vocal folds.
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