Finite element cochlear models and their steady state response |
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| Institution: | 1. Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea;2. School of Mechanical Engineering, GIST, Gwangju 61005, Republic of Korea;3. Department of Urology, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, South Korea;1. Institute of Imaging Science, Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, USA;2. Department of Neurological Surgery, Vanderbilt University Medical Center, USA;3. Department of Biomedical Engineering, Vanderbilt University, USA;1. Department of Mechatronics and Mechanical Systems Engineering, School of Engineering, University of São Paulo, SP, Brazil;2. Department of Mechanical Engineering, Faculty of Mines, Universidad Nacional de Colombia, Medellín, 050034, Colombia;3. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;1. C. Doppler Laboratory for Active Implantable Systems, Institute of Ion Physics and Applied Physics, University of Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria;2. Univ. Dept. of Otorhinolaryngology, Head and Neck Surgery, University Hospital Antwerp, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium;3. Department of Otolaryngology, NYU School of Medicine, 550 1st Avenue NBV 5E5, New York, NY 10016, USA;4. Univ. Dept. of Radiology, University Hospital Antwerp, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium;5. Institute of Mechatronics, University of Innsbruck, Technikerstraße 13, 6020 Innsbruck, Austria |
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| Abstract: | Numerical cochlear models are constructed by means of a finite element approach and their frequency and spatial responses are calculated. The cochlea is modelled as a coupled fluid-membrane system, for which both two- and three-dimensional models are considered. The fluid in the scala canals is assumed to be incompressible and the basilar membrane is assumed to be a locally reactive impedance wall or a lossy elastic membrane. With the three-dimensional models, the effects are examined of the spiral configuration of the cochlea, of the presence of the lamina and the ligament that narrows the coupling area between the two fluid canals (scala vestibuli and scala tympani), and of the extended reaction of the basilar membrane which cannot be included in case of the two-dimensional models. The conclusion is that these effects on the cochlear response and the inherent mechanism governing the cochlear behaviour are found to be rather secondary. |
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