Phonation threshold pressure and onset frequency in a two-layer physical model of the vocal folds

The influence of vocal fold geometry and stiffness on phonation onset was experimentally investigated using a body-cover physical model of the vocal folds. Results showed that a lower phonation threshold pressure and phonation onset frequency can be achieved by reducing body-layer or cover-layer sti...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2011-11, Vol.130 (5), p.2961-2968
Main Authors: Mendelsohn, Abie H., Zhang, Zhaoyan
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biomechanical Phenomena
Ear and associated structures. Auditory pathways and centers. Hearing. Vocal organ. Phonation. Sound production. Echolocation
Elastic Modulus
Fundamental and applied biological sciences. Psychology
Humans
Models, Anatomic
Oscillometry
Phonation
Pressure
Speech Production
Vertebrates: nervous system and sense organs
Vocal Cords - anatomy & histology
Vocal Cords - physiology
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Summary:The influence of vocal fold geometry and stiffness on phonation onset was experimentally investigated using a body-cover physical model of the vocal folds. Results showed that a lower phonation threshold pressure and phonation onset frequency can be achieved by reducing body-layer or cover-layer stiffness, reducing medial surface thickness, or increasing cover-layer depth. Increasing body-layer stiffness also restricted vocal fold motion to the cover layer and reduced prephonatory glottal opening. Excitation of anterior-posterior modes was also observed, particularly for large values of the body-cover stiffness ratio. The results of this study were also discussed in relation to previous theoretical and experimental studies.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3644913