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Theoretical Framework for Modeling Ingressive Phonation Open Access


Other title
Aerodynamic state feedback
Modal analysis
Vocal tract and subglottal resonators
Ingressive phonation using a multi-mass model
Aeroacoustic coupling
Mucosal wave
Type of item
Degree grantor
University of Alberta
Author or creator
Brougham, Michael V
Supervisor and department
Fleck, Brian (Mechanical Engineering)
Carey, Jason (Mechanical Engineering)
Examining committee member and department
Carey, Jason (Mechanical Engineering)
Fleck, Brian (Mechanical Engineering)
Raboud, Don (Mechanical Engineering)
Fagnan, Laurier (Faculté Saint-Jean)
Department of Mechanical Engineering

Date accepted
Graduation date
Master of Science
Degree level
Researchers in vocal acoustics have used computer simulations of single and multi-mass models of the human vocal folds to study human phonation for over 40 years. They have successfully given insight into different voice qualities and registers as well as the irregular phonation associated with pathologies. This study hypothesizes that current techniques for simulating egressive phonation will also lead to self-oscillation of the vocal folds upon changing the pressure and flow orientation. Through symmetrical reasoning, well-established aeroelastic relations for multi-mass vocal fold models are generalized to cases where the lung pressure is negative and the air flows into the trachea. The pitch, flow rates, and phonation ranges are compared between the ingressive and egressive conditions. A modal analysis is used to understand the differences between the two approaches. This study shows that current techniques can be utilized to simulate ingressive phonation and provides a unified framework for both kinds of phonation.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File title: Brougham_Michael_Fall 2012
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