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TECHNICAL PAPERS

A Numerical Analysis of Phonation Using a Two-Dimensional Flexible Channel Model of the Vocal Folds

[+] Author and Article Information
Tadashige Ikeda, Yuji Matsuzaki, Tatsuya Aomatsu

Department of Aerospace Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603 Japan

J Biomech Eng 123(6), 571-579 (Jul 25, 2001) (9 pages) doi:10.1115/1.1408939 History: Received May 31, 2000; Revised July 25, 2001
Copyright © 2001 by ASME
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References

Figures

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Schematic diagram of an airway model, where the larynx is a frontal section although the vocal tract is a sagittal section
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Configuration of the true and false vocal folds for Bex=0.0002 m
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Area distributions of the vocal tract for /a/ and /i/, where the horizontal axis is the distance from the upstream end of the vocal tract
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Waveforms for /a/ in the nonresonance–noncollision case. They are from the top to the bottom, the total and static pressures at the mouth, TP and Pm, which are represented, respectively, by solid and broken curves, the static pressures at the up- and downstream ends of the glottis, Psb and Psp, represented by solid and broken curves, the time derivative of the flow rate at the downstream end of the glottis, Qsp, t, the flow rate at the up- and downstream ends of the glottis, Qsb and Qsp, represented by solid and broken curves, and a half of the width at the downstream end of the glottis, Bsp.
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Spectrum of the total pressure at the mouth for the case of Fig. 4, where arrows indicate the resonant frequencies of the vocal tract
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Instantaneous frontal cross sections of the vocal fold at every 0.002 s from 0.055 s to 0.065 s for the case of Fig. 4
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Waveforms for /i/ in the nonresonance–noncollision case
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Spectrum of the total pressure at the mouth for the case of Fig. 7
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Waveforms for /a/ in the resonance–noncollision case
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Spectrum of the total pressure at the mouth for the case of Fig. 9
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Waveforms for /i/ in the resonance–noncollision case
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Spectrum of the total pressure at the mouth for the case of Fig. 11
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Waveforms for /a/ in the resonance–collision case. They are from the top to the bottom, the total pressures at the mount, TP, the static pressures at the up- and downstream ends of the glottis, Psb and Psp, represented by solid and broken curves, the flow rate at the up- and downstream ends of the glottis, Qsb and Qsp, and a half of the width at the downstream end of the glottis, Bsp.
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Spectrum of the total pressure at the mouth for the case of Fig. 13
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Instantaneous frontal cross sections of the vocal fold at every 0.002 s from 0.059 s to 0.069 s for the case of Fig. 13
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Waveforms for /i/ in the resonance–collision case
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Spectrum of the total pressure at the mouth for the case of Fig. 16

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