Abstract
Stresses in vocal-fold tissues during normal phonation
The Journal of the Acoustical Society of America, Vol.60(S1), pp.S64-S64
11/01/1976
DOI: 10.1121/1.2003463
Abstract
In order to predict the occurrence of pathologic conditions in the vocal-fold tissues resulting from abnormal use and abuse, a theoretical study of various shear and compressional stresses under normal phonation has been attempted. Results are based on a continuum as well as a finite element of model of the vocal folds. These models differ from previous ones in that distributive mechanical properties, i.e., shear elasticity and viscosity, are used to describe the dynamics. It is shown that near glottal closure the stresses at the medial boundary of the vocal folds resemble a doublet, i.e., a sharp negative stress resulting from the short range Bernoulli forces followed by an immediate positive stress after closure resulting from vocal fold collision. The peak to peak magnitude of this doublet can be of the order of 105–106 dyn/cm2 and occurs in a time interval of the order of 10−4 sec. Such an impulse could easily contribute to permanent tissue modification, and the formation of pathologies such as contact ulcers and vocal nodules. Modes of phonation which may avoid such a high stress concentration are discussed.
Details
- Title: Subtitle
- Stresses in vocal-fold tissues during normal phonation
- Creators
- Ingo R. Titze - Gallaudet University
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.60(S1), pp.S64-S64
- Publisher
- AMER INST PHYSICS; WOODBURY
- DOI
- 10.1121/1.2003463
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 11/01/1976
- Academic Unit
- Communication Sciences and Disorders; School of Music
- Record Identifier
- 9984719852902771
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