Three-dimensional Modeling of Middle Ear Biomechanics and Its Applications

Gan, Rong Z.; Sun, Qunli; Dyer, R. Kent; Chang, Kuang-Hua; Dormer, Kenneth J.

doi:10.1097/00129492-200205000-00008

Cited by 100 publications

(69 citation statements)

References 20 publications

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“…This biomechanical system of the middle ear can move in 3D space in a complex manner. Therefore, the Finite Element Method (FEM) is often used to study spatial vibrations of the ossicles [1,2,3,4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

FEM model of middle ear prosthesis with pseudo-elastic effect

Krzysztof

Klein

Rusinek

2018

AIP Conference Proceedings

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Abstract. In this paper a concept of the middle ear prosthesis made of the shape memory alloy is presented. Natural vibrations of the shape memory prosthesis are investigated with the help of the finite element method in order to verify possibility of its implementation to the human middle ear. Next, the simplified prosthesis is introduced to the ear model and the system response is investigated. Results show that, Vibration modes and frequencies of the reconstructed middle ear are similar to the intact ear.

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Section: Introductionmentioning

confidence: 99%

FEM model of middle ear prosthesis with pseudo-elastic effect

Krzysztof

Klein

Rusinek

2018

AIP Conference Proceedings

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“…Furthermore, to assess quality of interior pressure, proper features should be used to correlate mobility of TM with ear discomfort. Displacement, volume displacement [6] , displacement transfer function (DTF) [7][8] , velocity [9] , velocity transfer function (VTF) [10] are universally employed to explain the dynamics of TM. Displacement and velocity are easy to yield in LS-DYNA, of which displacement is a convincing indicator to weigh the ear discomfort level.…”

Section: Introductionmentioning

confidence: 99%

Aural Discomfort Evaluation of Barometric Pressure in High-speed Train

Xie¹,

Peng²,

Zhang³

et al. 2017

dtetr

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Interior pressure of high-speed train varies when it passes through tunnels, which usually caused different levels of aural discomfort. As tympanic membrane (TM) plays a prominent role in pressure energy conversion and transmission, a finite element (FE) model including annular ligament (AL), pars flacidda (PF) and pars tensa (PT), was established in line with its anatomical structure. To quantitatively assess the barometric quality of train cabins, on-board tests were conducted to collect the interior pressure change history. Additionally, TM simulation in LS-DYNA was implemented to investigate the relationship between pressure changes and vibration characteristics. Based on the simulation results, displacement and velocity transfer function (VTF) of umbo were integrated as two indicators to judge aural discomfort and four discomfort levels were divided ranging from ideal, good, bad to worse. The results indicate that the threshold of displacement for each discomfort levels is 1.81μm, 2.10μm, 5.95μm and 11μm _______________________ 363respectively and the lower and upper bounds of VTF were confirmed as well. By imposing the recorded interior pressure onto TM surface, the displacement and VTF were produced. Depending on the established aural discomfort judgment method, the results derived from simulation under interior pressure load reveal that travellers in passenger cabin of head car experience large proportion of inner ear annoyance while crew in driver cabin undergo mixed discomfort from both TM and inner ear.

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“…While there are multiple model descriptions of TM structure and function, progressing from simple piston models (Shaw and Stinson, 1983), through curved-membrane catenary-dependent models (Goll and Dalhoff, 2011), to complex three-dimensional (3D) finite element models (e.g., Funnell et al, 1987;Williams and Lesser, 1990;Blayney et al, 1997;Gan et al, 2002;Koike et al, 2002;Fay et al, 2005), there is no complete description of how the surface of the TM moves in response to sound to test these models. The most complete descriptions of sound-induced TM motion come from recent stroboscopic holography measurements that quantify the sound-induced displacement at over 500 000 points on the TM surface, but only along a single measurement direction (Cheng et al, 2010;Cheng et al, 2013;Cheng et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

In-plane and out-of-plane motions of the human tympanic membrane

Khaleghi

Cheng

Furlong

et al. 2016

The Journal of the Acoustical Society of America

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Computer-controlled digital holographic techniques are developed and used to measure shape and four-dimensional nano-scale displacements of the surface of the tympanic membrane (TM) in cadaveric human ears in response to tonal sounds. The combination of these measurements (shape and sound-induced motions) allows the calculation of the out-of-plane (perpendicular to the surface) and in-plane (tangential) motion components at over 1 000 000 points on the TM surface with a high-degree of accuracy and sensitivity. A general conclusion is that the in-plane motion components are 10-20 dB smaller than the out-of-plane motions. These conditions are most often compromised with higher-frequency sound stimuli where the overall displacements are smaller, or the spatial density of holographic fringes is higher, both of which increase the uncertainty of the measurements. The results are consistent with the TM acting as a Kirchhoff-Love's thin shell dominated by out-of-plane motion with little in-plane motion, at least with stimulus frequencies up to 8 kHz.

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Three-dimensional Modeling of Middle Ear Biomechanics and Its Applications

Abstract: Accurate FE modeling, incorporating both morphometric and interferometric performance data, predicted both normal and pathologic mechanical performance of the human ossicular chain.

Cited by 100 publications

References 20 publications

FEM model of middle ear prosthesis with pseudo-elastic effect

FEM model of middle ear prosthesis with pseudo-elastic effect

Aural Discomfort Evaluation of Barometric Pressure in High-speed Train

In-plane and out-of-plane motions of the human tympanic membrane

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