Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

Design of Implantable Microphone for Artificial Middle Ear System

  • Kim Min-Kyu (Dept. of Biological & Medical Engineering, School of Medicine, Kyungpook National University) ;
  • Lim Hyung-Gyu (School of Electrical Engineering & Computer Science, Kyungpook National University) ;
  • Yoon Young-Ho (School of Electrical Engineering & Computer Science, Kyungpook National University) ;
  • Lee Jyung-Hyun (School of Electrical Engineering & Computer Science, Kyungpook National University) ;
  • Park Il-Yong (Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University) ;
  • Song Byung-Seop (Department of Rehabilitation Engineering, Daegu University) ;
  • Kim Myoung-Nam (Dept. of Biological & Medical Engineering, School of Medicine, Kyungpook National University) ;
  • Cho Jin-Ho (Dept. of Biological & Medical Engineering, School of Medicine, Kyungpook National University, Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University)
  • Published : 2005.06.01
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Abstract

An implantable microphone that can be utilized as part of a totally implantable hearing aid is designed and implemented. The proposed microphone is implanted in the center of the pinna, and designed to ensure the speech frequency range and the appropriate sensitivity. The characteristics of the proposed microphone are evaluated using a finite element analysis (FEA). The microphone is composed of a small electric condenser microphone, titanium case 6.2mm in diameter and 3mm high, and $10{\mu}m$ SUS316L vibrating membrane in contact with hypodermic tissue to maintain the sensitivity of the microphone. The microphone components are all made of biocompatible materials, then the assembled microphone is hermetically sealed using a polymer and ceramic. Experiments with the fabricated microphone confirm an operational bandwidth of up to 5kHz without any decline of sensitivity in 6mm of hypodermic tissue.

Keywords

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