Journal article
Viscoelastic shear properties of human vocal fold mucosa: Measurement methodology and empirical results
The Journal of the Acoustical Society of America, Vol.106(4), pp.2008-2021
10/01/1999
DOI: 10.1121/1.427947
PMID: 10530024
Abstract
A standard method for the empirical rheological characterization of viscoelastic materials was adopted to measure the viscoelastic shear properties of human vocal-fold mucosal tissues (the superficial layer of lamina propria). A parallel-plate rotational rheometer was employed to measure shear deformation of viscoelastic tissue samples, which were deformed between two rigid circular plates rotating in small-amplitude sinusoidal oscillations. Elastic and viscous shear moduli of the samples were then quantified as a function of oscillation frequency (0.01 to 15 Hz) based on shear stresses and strains recorded by the rheometer. Data were obtained from 15 excised human larynges (10 male and 5 female). Results showed that the elastic shear modulus μ and the damping ratio ζ of human vocal-fold mucosa were relatively constant across the range of frequencies observed, while the dynamic viscosity η decreased monotonically with frequency (i.e., shear thinning). Intersubject differences in μ and η as large as an order of magnitude were observed, part of which may reflect age-related and gender-related differences. Some molecular interpretations of the findings are discussed.
Details
- Title: Subtitle
- Viscoelastic shear properties of human vocal fold mucosa: Measurement methodology and empirical results
- Creators
- Roger W. Chan - University of IowaIngo R. Titze - University of Iowa
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.106(4), pp.2008-2021
- DOI
- 10.1121/1.427947
- PMID
- 10530024
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Number of pages
- 14
- Language
- English
- Date published
- 10/01/1999
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719753002771
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