Related Experiment Videos
Assessment of vocal function using simultaneous aerodynamic and calibrated videostroboscopic measures
J B Kobler1, R E Hillman, S M Zeitels
1Harris Peyton Mosher Laryngological Research Laboratory, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston 02114, USA.
The Annals of Otology, Rhinology, and Laryngology
|July 11, 1998
Summary
This study introduces a new system for measuring vocal fold function during phonation. It combines endoscopic imaging with aerodynamic measurements, showing good correlation but highlighting challenges with small glottal constrictions.
Area of Science:
- Laryngology
- Bioengineering
- Acoustics
Background:
- Modeling vocal fold dynamics and aerodynamics during phonation is challenging due to limited simultaneous measurements.
- Simultaneous measurement of glottal area, transglottal pressures, and flows is crucial for understanding phonation.
- Existing methods for assessing vocal fold function lack comprehensive, integrated measurement capabilities.
Purpose of the Study:
- To develop and validate a novel system for simultaneous measurement of glottal area and transglottal aerodynamics during phonation.
- To compare endoscopic glottal area measurements with predictions from an aerodynamic airflow model.
- To assess the accuracy of the measurement system, particularly for small glottal constrictions.
Main Methods:
- A novel system integrating endoscopic glottal area measurement with aerodynamic flow and pressure sensors was developed.
- Benchtop model tests and phonation experiments with a human subject were conducted.
- An aerodynamic airflow model was used to predict glottal constriction area, compared against endoscopic measurements.
Main Results:
- The novel system demonstrated good correlation between predicted and endoscopically measured glottal areas.
- Significant increases in estimation errors for both optical and aerodynamic methods were observed for small constrictions (<0.025 cm2).
- The system showed potential for enhancing the assessment of vocal fold function.
Conclusions:
- The developed measurement system provides a promising approach for simultaneous assessment of glottal dynamics and aerodynamics.
- Accuracy limitations exist for very small glottal constrictions, warranting further investigation.
- This technology has the potential to improve clinical and research-based evaluation of voice production and disorders.