Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Finite Element Analysis of Sound Transfer Characteristics for Middle Ear

유한요소 모델을 이용한 중이의 소리전달 특성 해석

  • Gal, Young-Min (Dept. of Mechanical Engineering, Dong-eui Univ.) ;
  • Baek, Moo-Jin (Dept. of Otolaryngology Head and Neck Surgery, Inje University Haeundae Paik Hospital) ;
  • Lee, Doo-Ho (Dept. of Mechanical Engineering, Dong-eui Univ.)
  • 갈영민 (동의대학교 기계공학과) ;
  • 백무진 (인제대학교 해운대 백병원 이비인후과) ;
  • 이두호 (동의대학교 기계공학과)
  • Received : 2011.04.19
  • Accepted : 2011.05.17
  • Published : 2011.12.01
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Abstract

In this study, we developed a finite element model of the human middle ear has been developed to calculate itsfor sound transfer characteristics calculation. We usedThe geometric data forof ossicles, obtained byfrom micro-CT scanning, was used in order to develop the middle- ear FE model. A right- side temporal bone of a Korean cadaver was used for the micro-CT scanning. The developed FE model includes three ossicles, the tympanic membrane, ligaments, and muscles. We calculated theA sound transfer function from the tympanic membrane to the stapes footplate was calculated. The sound transfer function calculated vias of the FE model shows good agreement with measured responses over the 10- kHz frequency band. To measureidentify the sensitivityies of the middle- ear function due to material property variation, we studied several parameters studies have been fulfilled using the middle ear FE model. TAs a result the stiffness property of the incudostapedial joint had the greatest influence onwas the most influential to the middle- ear sound transfer function among the parameters.

본 연구에서는 인간중이의 소리전달특성 계산을 위한 유한요소모델을 개발하였다. 이소골의 형상을 얻기 위하여 한국인 사체에서 추출한 측두골을 마이크로 CT 촬영하여 3 차원 입체모델로 변환하였다. 유한요소모델은 이소골, 고막, 인대와 근육 등을 포함하여 구성하였다. 유한요소모델을 이용하여 고막에서 등골족판까지의 응답함수를 계산한 후 측정값을 갖는 선행연구와 비교하였고 그 결과 10 kHz 주파수 대역까지 소리전달특성을 잘 표현하고 있음을 보였다. 또한 유한요소 모델을 구성하는 주요 물성인자의 변화에 대한 소리전달특성의 변화를 살피고 침등골관절의 강성값이 중이의 소리전달특성에 큰 영향을 미침을 보였다.

Keywords

References

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