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ERIC Number: EJ984839
Record Type: Journal
Publication Date: 2012-Oct
Pages: 12
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-1092-4388
Frequency Response of Synthetic Vocal Fold Models with Linear and Nonlinear Material Properties
Shaw, Stephanie M.; Thomson, Scott L.; Dromey, Christopher; Smith, Simeon
Journal of Speech, Language, and Hearing Research, v55 n5 p1395-1406 Oct 2012
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[subscript 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[subscript on]) and F[subscript 0] at P[subscript 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[subscript 0] increase with respect to increasing length (although range was inconsistent across models). P[subscript on] generally increased with increasing vocal fold length for nonlinear models, whereas for linear models, P[subscript 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[subscript 0] response.
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A