Title
Dynamic motion of human tympanic membrane: stroboscopic holography measurement and finite element analysisDynamic motion of human tympanic membrane: stroboscopic holography measurement and finite element analysis
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Biophysics and Biomedical Physics
Publication type
conferenceObject
Publication
Subject
Physics
Source (journal)
OPTICAL MEASUREMENT TECHNIQUES FOR STRUCTURES & SYSTEMS2 (OPTIMESS2012)
Source (book)
5th International Conference on Optical Measurement Techniques for, Structures and Systems2 (OPTIMESS), APR 04-05, 2012, Antwerp, BELGIUM
Volume/pages
(2013), p. 1-12
ISBN
978-90-423-0419-2
ISI
000319343800001
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
The biomechanics of the human tympanic membrane yield a very sensitive sound transmission in a frequency spectrum ranging from 20 Hz till 20 kHz. In this work, motion of the tympanic membrane surface was investigated through stroboscopic holography and dynamic finite element modeling. Sound induced motion of the tympanic membrane was studied by stroboscopic holography, which measures both amplitude and phase of the displacement of the membrane surface. At low frequencies (< 2 kHz), the membrane moves with one to three displacement maxima. At higher stimulus frequencies, the motion becomes more complex with multiple areas of maximal amplitude and different phase. These patterns can be described as a combination of standing-wave-like modal motion and travelling wave components. A finite element model was constructed based on recent geometry measurements with micro-CT. In the model, a uniform sound stimulus was applied and the resulting tympanic membrane motion was calculated for various frequencies. The model reveals the importance of including damping in the tympanic membrane and discusses the wave motion apparent on the surface of the tympanic membrane.
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