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Laryngeal vibrations: a comparison between high-speed filming and glottographic techniques
The Journal of the Acoustical Society of America
|April 1, 1983
Summary
High-speed filming, photoglottography (PGG), and electroglottography (ECG) were compared for laryngeal vibration analysis. PGG and film measurements align, while ECG reliably indicates vocal fold contact for voice analysis.
Area of Science:
- Laryngology
- Speech Science
- Biophysics
Background:
- Understanding laryngeal vibration is crucial for voice production and disorders.
- High-speed filming, photoglottography (PGG), and electroglottography (ECG) are methods to study vocal fold dynamics.
Purpose of the Study:
- To compare the information obtained from high-speed filming, PGG, and ECG in analyzing laryngeal vibrations.
- To assess the utility of PGG and ECG as alternatives to high-speed filming.
Main Methods:
- Simultaneous recording of glottographic signals (PGG and ECG) and high-speed films during steady phonation.
- Measurement of glottal width at multiple points along the glottis.
Main Results:
- Photoglottography and high-speed filming provided comparable data on peak glottal opening and closure.
- Electroglottography reliably indicated vocal fold contact.
- PGG and ECG together may replicate much of the data from high-speed filming.
Conclusions:
- PGG and ECG offer valuable insights into vocal fold dynamics.
- These methods may potentially detect horizontal phase differences during vocal fold vibration.
- PGG and ECG present a potentially more accessible alternative to high-speed filming for voice research.