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A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing

A three-dimensional finite-element (FE) model of a human dry skull was devised for simulation of human bone-conduction (BC) hearing. Although a dry skull is a simplification of the real complex human skull, such model is valuable for understanding basic BC hearing processes. For validation of the mo...

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Detalles Bibliográficos
Autores principales: Kim, Namkeun, Chang, You, Stenfelt, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160632/
https://www.ncbi.nlm.nih.gov/pubmed/25243148
http://dx.doi.org/10.1155/2014/519429
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author Kim, Namkeun
Chang, You
Stenfelt, Stefan
author_facet Kim, Namkeun
Chang, You
Stenfelt, Stefan
author_sort Kim, Namkeun
collection PubMed
description A three-dimensional finite-element (FE) model of a human dry skull was devised for simulation of human bone-conduction (BC) hearing. Although a dry skull is a simplification of the real complex human skull, such model is valuable for understanding basic BC hearing processes. For validation of the model, the mechanical point impedance of the skull as well as the acceleration of the ipsilateral and contralateral cochlear bone was computed and compared to experimental results. Simulation results showed reasonable consistency between the mechanical point impedance and the experimental measurements when Young's modulus for skull and polyurethane was set to be 7.3 GPa and 1 MPa with 0.01 and 0.1 loss factors at 1 kHz, respectively. Moreover, the acceleration in the medial-lateral direction showed the best correspondence with the published experimental data, whereas the acceleration in the inferior-superior direction showed the largest discrepancy. However, the results were reasonable considering that different geometries were used for the 3D FE skull and the skull used in the published experimental study. The dry skull model is a first step for understanding BC hearing mechanism in a human head and simulation results can be used to predict vibration pattern of the bone surrounding the middle and inner ear during BC stimulation.
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spelling pubmed-41606322014-09-21 A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing Kim, Namkeun Chang, You Stenfelt, Stefan Biomed Res Int Research Article A three-dimensional finite-element (FE) model of a human dry skull was devised for simulation of human bone-conduction (BC) hearing. Although a dry skull is a simplification of the real complex human skull, such model is valuable for understanding basic BC hearing processes. For validation of the model, the mechanical point impedance of the skull as well as the acceleration of the ipsilateral and contralateral cochlear bone was computed and compared to experimental results. Simulation results showed reasonable consistency between the mechanical point impedance and the experimental measurements when Young's modulus for skull and polyurethane was set to be 7.3 GPa and 1 MPa with 0.01 and 0.1 loss factors at 1 kHz, respectively. Moreover, the acceleration in the medial-lateral direction showed the best correspondence with the published experimental data, whereas the acceleration in the inferior-superior direction showed the largest discrepancy. However, the results were reasonable considering that different geometries were used for the 3D FE skull and the skull used in the published experimental study. The dry skull model is a first step for understanding BC hearing mechanism in a human head and simulation results can be used to predict vibration pattern of the bone surrounding the middle and inner ear during BC stimulation. Hindawi Publishing Corporation 2014 2014-08-27 /pmc/articles/PMC4160632/ /pubmed/25243148 http://dx.doi.org/10.1155/2014/519429 Text en Copyright © 2014 Namkeun Kim et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Kim, Namkeun
Chang, You
Stenfelt, Stefan
A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title_full A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title_fullStr A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title_full_unstemmed A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title_short A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
title_sort three-dimensional finite-element model of a human dry skull for bone-conduction hearing
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160632/
https://www.ncbi.nlm.nih.gov/pubmed/25243148
http://dx.doi.org/10.1155/2014/519429
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