رسالة جامعية
Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds
| العنوان: | Analysis of Voice Perturbations Using an Asymmetric Model of the Vocal Folds |
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| المؤلفون: | Nardone, Marco |
| بيانات النشر: | Bowling Green State University / OhioLINK, 2007. |
| سنة النشر: | 2007 |
| المجموعة: | Ohiolink ETDs |
| Original Material: | http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009Test |
| مصطلحات موضوعية: | Physics, Acoustics, voice, jitter, shimmer, Mathematica, vocal folds |
| الوصف: | 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. |
| Original Identifier: | oai:etd.ohiolink.edu:bgsu1183755009 |
| نوع الوثيقة: | text |
| اللغة: | English |
| الإتاحة: | http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1183755009Test |
| حقوق: | unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| رقم الانضمام: | edsndl.OhioLink.oai.etd.ohiolink.edu.bgsu1183755009 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |