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Updated: Feb 11, 2026
10:13
Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
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Vocal fold contact patterns based on normal modes of vibration.
Simeon L Smith1, Ingo R Titze1
1The National Center for Voice and Speech, The University of Utah, 136 South Main Street, Suite 320, Salt Lake City, UT 84101, United States.
Journal of Biomechanics
|April 23, 2018
Summary
This study models vocal fold contact patterns using normal mode vibrations to understand voice production. Eight distinct contact patterns were identified, aiding in voice disorder research and improved vocal fold models.
Area of Science:
- Biomechanics of speech production
- Fluid-structure interaction in phonation
Background:
- Vocal fold vibration is crucial for voice production, driven by airflow and glottal geometry.
- Understanding vocal fold contact patterns is key to voice physiology and modeling, but systematic characterization is lacking.
Purpose of the Study:
- To systematically characterize vocal fold contact patterns.
- To provide a foundational inventory of glottal shapes for voice research.
- To inform the development of advanced vocal fold models.
Main Methods:
- Modeled vocal fold motion and contact using normal mode vibration theory.
- Superimposed lowest order vibrational modes on vocal fold surfaces for three glottal configurations.
- Generated contact patterns across 16 phases of the vibratory cycle using a surface wave approach.
Main Results:
- Identified and characterized eight major vocal fold contact patterns.
- Classified patterns by flow channel shape: convergent, divergent, convergent-divergent, uniform, split, merged, island, and multichannel.
- Described variations within each contact pattern.
Conclusions:
- The study provides a systematic classification of vocal fold contact patterns.
- This characterization advances the understanding of normal and abnormal voice physiology.
- The findings support the development of more accurate computational models of the vocal folds.
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