characterisation of the elasticity of the human vocal fold using electromechanical measurement...
TRANSCRIPT
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Characterisation of the Elasticity of the Human Vocal Fold using
Electromechanical Measurement Techniques
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Characterisation of the Elasticity of the Human Vocal Fold using
Electromechanical Measurement Techniques
The Linear Skin Rheometer
The Laryngeal Tensiometer
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LSR Principle of Operation
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Shear Mode Operation
Force ~ Displacement Graph
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Indentor Mode
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Results from Harvard - AQL 2003
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Results from Wisconsin - 2005
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Typical Experimental Setup
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Vocal Fold Shear Modulus - Shear Model
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Age
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Vocal Fold Shear Modulus - Indentometer Model
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Male FemaleShear 1008 190 1237 384Indent 1000 230 1332 214
Summary of Shear Modulus Results
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The Laryngeal Tensiometer
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•Show clips now
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Shear Strain
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Time
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Methyl Cellulose Attachment
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Suction Attachment
Suction
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Age Sex CofV Shear ModulusMean Pascals
36 F 15% 93337 F 19% 77728 F 11% 70170 F - 197228 F 10% 181952 F 27% 90163 M 22% 163755 M 17% 2225
Range of Shear Modulus Obtained from 8Volunteer Patients
First Suction results CofV = 3% & 8%
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Spinning
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Angle
DSR
Elastic Variance with angle
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Complete Vocal Fold
00.20.40.60.8
11.2
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Angle (90 = transverse)
Stif
fnes
s
Anisotropic Behaviour Study
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Ligament & Muscle
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Muscle Only
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Complete 0.38
Ligament 0.53
Muscle 0.61
Ratio of Transverse to Longitudinal Stiffness
Implies LP is inherently anisotropic
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