Frequency response of synthetic vocal fold models with linear and nonlinear material properties
| Autor: | Stephanie M. Shaw, Christopher Dromey, Simeon L. Smith, Scott L. Thomson |
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| Rok vydání: | 2012 |
| Předmět: |
Models
Anatomic Linguistics and Language Frequency response Materials science Fold (higher-order function) Acoustics Acrylic Resins Vocal Cords Models Biological Vibration Language and Linguistics Article Speech and Hearing Phonation medicine Pressure Humans Linear model Nonlinear system medicine.anatomical_structure Nonlinear Dynamics Vocal folds Linear Models Voice Stress Mechanical Material properties Biological system Aluminum |
| Zdroj: | Journal of speech, language, and hearing research : JSLHR. 55(5) |
| ISSN: | 1558-9102 |
| Popis: | Purpose The purpose of this study was to create synthetic vocal fold models with nonlinear stress-strain properties and to investigate the effect of linear versus nonlinear material properties on fundamental frequency (F 0 ) during anterior–posterior stretching. Method Three materially linear and 3 materially nonlinear models were created and stretched up to 10 mm in 1-mm increments. Phonation onset pressure (P on ) and F 0 at P on were recorded for each length. Measurements were repeated as the models were relaxed in 1-mm increments back to their resting lengths, and tensile tests were conducted to determine the stress-strain responses of linear versus nonlinear models. Results Nonlinear models demonstrated a more substantial frequency response than did linear models and a more predictable pattern of F 0 increase with respect to increasing length (although range was inconsistent across models). P on generally increased with increasing vocal fold length for nonlinear models, whereas for linear models, P on decreased with increasing length. Conclusion Nonlinear synthetic models appear to more accurately represent the human vocal folds than do linear models, especially with respect to F 0 response. |
| Databáze: | OpenAIRE |
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