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Published on: December 2, 2011
On the relation between subglottal pressure and fundamental frequency in phonation
1Department of Speech Pathology and Audiology, University of Iowa, Iowa City 52242.
The Journal of the Acoustical Society of America
|February 1, 1989
Summary
Vocal fold vibration causes dynamic tension, leading to amplitude-frequency dependence. This explains the predictable rise in fundamental frequency with increasing subglottal pressure during phonation in the chest register.
Area of Science:
- Acoustic phonetics
- Bioacoustics
- Voice production mechanisms
Background:
- Fundamental frequency changes with subglottal pressure are crucial in voice production.
- Understanding vocal fold mechanics is key to explaining voice alterations.
Purpose of the Study:
- To quantify the relationship between fundamental frequency and subglottal pressure.
- To elucidate the role of vocal fold tissue tension in amplitude-frequency dependence.
Main Methods:
- Quantification based on the ratio of vibrational amplitude to vocal fold length.
- Analysis of dynamic tension during the vibratory cycle.
Main Results:
- Vocal fold vibration exhibits significant amplitude-frequency dependence due to dynamic tension.
- A 2-6 Hz/cm H2O rise in fundamental frequency with subglottal pressure is a predictable outcome.
- Findings are specific to phonation within the chest register.
Conclusions:
- Dynamic tension in vocal folds directly influences fundamental frequency.
- Amplitude-frequency dependence provides a mechanistic explanation for observed frequency changes with pressure.
- The chest register's phonation mechanics are well-described by this model.
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