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Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds

Nardone, Marco
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009

Abstract Details

2007, Master of Science (MS), Bowling Green State University, Physics.
A mathematical model was developed to investigate possible causes of jitter and shimmer. The model builds from the classic, lumped element, two-mass model of Ishizaka and Flanagan. Bilateral asymmetry was incorporated into the model to facilitate the simulation of physiological and aerodynamic imbalances in the larynx. The aerodynamic driving forces on the vocal folds were derived from empirical pressure data that were obtained from a scaled-up Plexiglas model of a typical male human larynx, called M5. The mathematical model is based on ten, second-order, nonlinear, coupled, ordinary differential equations that were solved simultaneously using the software Mathematica. The solutions were analyzed graphically and numerically to identify perturbations in the fundamental frequency and amplitude of the glottal airflow. Jitter and shimmer were quantified using the jitter factor and the amplitude variability index. The results indicate that only time-dependent asymmetries result in jitter and shimmer.
Lewis Fulcher (Advisor)
114 p.
Physics, Acoustics
voice; jitter; shimmer; Mathematica; vocal folds

Recommended Citations

Citations

  • Nardone, M. (2007). Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009

    APA Style (7th edition)

  • Nardone, Marco. Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds. 2007. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009.

    MLA Style (8th edition)

  • Nardone, Marco. "Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds." Master's thesis, Bowling Green State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009

    Chicago Manual of Style (17th edition)

bgsu1183755009
1,167
© 2007, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.