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A Simulation Study of Artificial Cochlea Based on Artificial Basilar Membrane for Improving the Performance of Frequency Separation

인공기저막 기반 인공와우의 주파수 분리 성능향상을 위한 인공기저막 전산모사

  • Kim, Tae-In (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.) ;
  • Chang, Seong-Min (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.) ;
  • Song, Won-Joon (Dept. of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Materials) ;
  • Bae, Sung-Jae (Dept. of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Materials) ;
  • Kim, Wan-Doo (Dept. of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Materials) ;
  • Cho, Maeng-Hyo (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.)
  • Received : 2012.01.05
  • Accepted : 2012.01.25
  • Published : 2012.04.01

Abstract

The basilar membrane (BM), one of organs of cochlea, has the specific positions of the maximum amplitude at each of related frequencies. This phenomenon is due to the geometry of BM. In this study, as the part of the research for the development of fully implantable artificial cochlea which is based on polymer membrane, parametric studies are performed to suggest the desirable artificial basilar membrane model which can detect wider range of frequency separation. The vibro-acoustic characteristics of the artificial basilar membrane are predicted through finite element analysis using commercial software Abaqus. Simulation results are verified by comparing with experimental results. Various geometric shapes of the BM and residual stress effects on the BM are investigated through the parametric study to enable a wider detectable frequency separation range.

Keywords

Artificial Cochlea;Basilar Membrane;Frequency Separation;Acoustic-Structure Interaction

Acknowledgement

Supported by : 한국연구재단

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