Abstract
Pressure-flow relationship in a biophysical model of phonation
The Journal of the Acoustical Society of America, Vol.103(5_Supplement), pp.3057-3057
05/01/1998
DOI: 10.1121/1.422676
Abstract
Simulation data are presented from a computer model that combines vocal fold tissue mechanics, laryngeal aerodynamics, and vocal tract acoustics. These simulations are based upon the laws of physics that govern airflow, vibration of the vocal folds, and wave propagation in the vocal tract. The tissue mechanics was modeled with the finite element method with 100 nodes and 166 elements in each layer of the 15-layer model. The laryngeal aerodynamics was modeled by the solution of two-dimensional unsteady Navier–Stokes equations with a finite volume method with a 64×82 nonuniform staggered grid. The model has been used to demonstrate self-oscillatory characteristics of the vocal folds and the flow pattern in the larynx. In this study, simulations were performed for lung pressure ranging from 4 to 24 cm of water. Adduction control was simulated with activation of thyroarytenoid (TA) muscle that caused increased tension and bulging of the vocal folds. Results are reported for glottal waveform, nodal coordinates, and velocity distributions in the larynx. Preliminary data suggest that the relationship between mean pressure and mean flow is almost linear. Frequency and amplitude contours of the model as functions of the lung’s pressure and TA activation level reveal their increasing pattern with these parameters.
Details
- Title: Subtitle
- Pressure-flow relationship in a biophysical model of phonation
- Creators
- Fariborz Alipour - University of IowaIngo Titze - University of Iowa
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.103(5_Supplement), pp.3057-3057
- DOI
- 10.1121/1.422676
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 05/01/1998
- Academic Unit
- Communication Sciences and Disorders; School of Music
- Record Identifier
- 9984719734902771
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