title: Computational modeling of phonatory dynamics in a tubular three-dimensional model of the human larynx.
abstract: Simulation of the phonatory flow-structure interaction has been conducted in a three-dimensional, tubular shaped laryngeal model that has been designed with a high level of realism with respect to the human laryngeal anatomy. A non-linear spring-based contact force model is also implemented for the purpose of representing contact in more general conditions, especially those associated with three-dimensional modeling of phonation in the presence of vocal fold pathologies. The model is used to study the effects of a moderate (20%) vocal-fold tension imbalance on the phonatory dynamics. The characteristic features of phonation for normal as well as tension-imbalanced vocal folds, such as glottal waveform, glottal jet evolution, mucosal wave-type vocal-fold motion, modal entrainment, and asymmetric glottal jet deflection have been discussed in detail and compared to established data. It is found that while a moderate level of tension asymmetry does not change the vibratory dynamics significantly, it can potentially lead to measurable deterioration in voice quality.
authors.affiliation: Department of Mechanical Engineering, Johns Hopkins University, 126 Latrobe Hall, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
authors.forename: Q
authors.initials: Q
authors.lastname: Xue
authors.forename: R
authors.initials: R
authors.lastname: Mittal
authors.forename: X
authors.initials: X
authors.lastname: Zheng
authors.forename: S
authors.initials: S
authors.lastname: Bielamowicz
mesh_terms: D001696:Biomechanical Phenomena; D003196:Computer Graphics; D003198:Computer Simulation; D005931:Glottis / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D021621:Imaging, Three-Dimensional; D007818:Laryngeal Diseases / Q000473:pathology / Q000503:physiopathology*; D007830:Larynx / Q000473:pathology / Q000503:physiopathology*; D008953:Models, Anatomic; D017711:Nonlinear Dynamics; D010699:Phonation; D013314:Stress, Mechanical; D014732:Vibration; D014827:Vocal Cords / Q000473:pathology / Q000503:physiopathology; D014833:Voice Quality