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[Esophageal speech and TE shunt speech--a comparison using the same subjects]
N Nishizawa1, N Sakai, Y Inuyama
1Department of Otolaryngology, Hokkaido University, School of Medicine, Sapporo.
Nihon Jibiinkoka Gakkai Kaiho
|July 1, 1993
Summary
Esophageal speech and tracheoesophageal (TE) shunt speech share similar pseudoglottis formation mechanisms. However, esophageal speech results in higher vocal pitch and resistance compared to TE shunt speech.
Area of Science:
- Laryngology
- Speech Pathology
- Bioacoustics
Background:
- Laryngectomy necessitates alternative voice restoration methods.
- Esophageal speech and tracheoesophageal (TE) shunt speech are common techniques.
- Understanding the biomechanics of these speech methods is crucial for patient outcomes.
Purpose of the Study:
- To compare the phonation behaviors of esophageal speech and TE shunt speech.
- To investigate the aerodynamic properties and pseudoglottis (PE segment) behavior in both speech methods.
Main Methods:
- Utilized X-ray fluorography and fiberscopic observation of the PE segment.
- Examined aerodynamic parameters, including subpseudoglottic pressure.
- Compared vocal pitch and pseudoglottic resistance between the two speech methods in two laryngectomized subjects.
Main Results:
- Confirmed consistent pseudoglottis location and shape for both speech methods in each patient.
- Observed a positive correlation between subpseudoglottic pressure and vocal pitch/resistance.
- Found significantly higher vocal pitch and pseudoglottic resistance in esophageal speech versus TE shunt speech at similar pressure levels.
Conclusions:
- The mechanism of pseudoglottis formation appears consistent between esophageal and TE shunt speech.
- Differences in vocal pitch and resistance suggest distinct modulation of pseudoglottis tension and effective mass between the two methods.