TY - JOUR
T1 - Aerodynamically and acoustically driven modes of vibration in a physical model of the vocal folds
AU - Zhang, Zhaoyan
AU - Neubauer, Juergen
AU - Berry, David A.
N1 - Funding Information:
This study was supported by Research Grant No. R01 DC03072 from the National Institute on Deafness and Other Communication Disorders, the National Institutes of Health. The authors also thank Dr. Ingo R. Titze and other anonymous reviewers for their help in improving an earlier version of this manuscript.
PY - 2006
Y1 - 2006
N2 - In a single-layered, isotropic, physical model of the vocal folds, distinct phonation types were identified based on the medial surface dynamics of the vocal fold. For acoustically driven phonation, a single, in-phase, x -10 like eigenmode captured the essential dynamics, and coupled with one of the acoustic resonances of the subglottal tract. Thus, the fundamental frequency appeared to be determined primarily by a subglottal acoustic resonance. In contrast, aerodynamically driven phonation did not naturally appear in the single-layered model, but was facilitated by the introduction of a vertical constraint. For this phonation type, fundamental frequency was relatively independent of the acoustic resonances, and two eigenmodes were required to capture the essential dynamics of the vocal fold, including an out-of-phase x -11 like eigenmode and an in-phase x -10 like eigenmode, as described in earlier theoretical work. The two eigenmodes entrained to the same frequency, and were decoupled from subglottal acoustic resonances. With this independence from the acoustic resonances, vocal fold dynamics appeared to be determined primarily by near-field, fluid-structure interactions.
AB - In a single-layered, isotropic, physical model of the vocal folds, distinct phonation types were identified based on the medial surface dynamics of the vocal fold. For acoustically driven phonation, a single, in-phase, x -10 like eigenmode captured the essential dynamics, and coupled with one of the acoustic resonances of the subglottal tract. Thus, the fundamental frequency appeared to be determined primarily by a subglottal acoustic resonance. In contrast, aerodynamically driven phonation did not naturally appear in the single-layered model, but was facilitated by the introduction of a vertical constraint. For this phonation type, fundamental frequency was relatively independent of the acoustic resonances, and two eigenmodes were required to capture the essential dynamics of the vocal fold, including an out-of-phase x -11 like eigenmode and an in-phase x -10 like eigenmode, as described in earlier theoretical work. The two eigenmodes entrained to the same frequency, and were decoupled from subglottal acoustic resonances. With this independence from the acoustic resonances, vocal fold dynamics appeared to be determined primarily by near-field, fluid-structure interactions.
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U2 - 10.1121/1.2354025
DO - 10.1121/1.2354025
M3 - Article
C2 - 17139742
AN - SCOPUS:33750297332
SN - 0001-4966
VL - 120
SP - 2841
EP - 2849
JO - Journal of the Acoustical Society of America
JF - Journal of the Acoustical Society of America
IS - 5
ER -