Abstract
Generation and dissipation of heat in the vocal folds
The Journal of the Acoustical Society of America, Vol.71(S1), pp.S55-S55
04/01/1982
DOI: 10.1121/1.2019450
Abstract
The vocal folds may be represented as a viscoelastic system. The power dissipated in the vocal folds (Pf) during phonation results from viscous loss in the vocal fold tissues. It can be approximated on the basis of a simplified representation of the geometry and movement of the fold, and has been estimated to be a significant part of the available pulmonary power [Titze, Tenth Symposium, Care of the Professional Voice (1981)]. Assuming that the energy dissipated is converted into heat, it is added to heat generated by muscle contraction (Pm). Heat is lost by thermal conductivity (Pc) and blood perfusion (Pb). While Pf and Pm increase during phonation, Pb has been shown to decrease during phonation [Hiroto, Otol. Fukuoka 17, 1–5 (1971)]. From estimates of the thermal coefficients of routes by which heat is conducted away from the vocal folds, it is possible to conclude that a temperature gradient should exist between the medial and lateral sections of the folds. Experiments on excised larynges are described in which measurements of this temperature gradient provide an initial estimate of the portion of this temperature gradient due to viscous loss.
Details
- Title: Subtitle
- Generation and dissipation of heat in the vocal folds
- Creators
- Ingo R. Titze - University of IowaDonald S. Cooper - University of Iowa
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.71(S1), pp.S55-S55
- DOI
- 10.1121/1.2019450
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 04/01/1982
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719854602771
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