Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Design of Small Acoustic Filter for ITE Type Noise Protector

ITE 타입의 소음 차폐기용 소형 음향 필터의 설계

  • Lee, Yun-Jung (Dept. of Medical & Biological Eng., Graduate School, Kyungpook National Univesrity) ;
  • Kim, Pil-Un (Dept. of Medical & Biological Eng., Graduate School, Kyungpook National Univesrity) ;
  • Chang, Yong-Min (Dept. of Radiology, School of Medicine, Kyungpook National University) ;
  • Lee, Sang-Heun (Dept. of E.N.T., School of Medicine, Kyungpook National University) ;
  • Cho, Jin-Ho (Dept. of Biomedical Eng., School of Medicine, Kyungpook National University) ;
  • Kim, Myoung-Nam (Dept. of Biomedical Eng., School of Medicine, Kyungpook National University)
  • 이윤정 (경북대학교 대학원 의용생체공학과) ;
  • 김필운 (경북대학교 대학원 의용생체공학과) ;
  • 장용민 (경북대학교 의과대학 진단방사선과학교실) ;
  • 이상흔 (경북대학교 의과대학 이비인후과) ;
  • 조진호 (경북대학교 의과대학 의공학교실) ;
  • 김명남 (경북대학교 의과대학 의공학교실)
  • Published : 2004.11.30
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Abstract

The prevention of noise induced hearing loss is very important, because there is no treatment for it. There are some kinds of devices for hearing protection, and those are effective in preventing a noise induced hearing loss. However, people often resist the use of hearing protection devices because it is difficult to have a conversation. Therefore, a hearing protection device is must effective not only in hearing protection but also in preserving communication ability. In this paper, we proposed a small acoustic filter for ITE type noise protector to solving the problem about the difficulties of conversation. That is applied a principle of acoustic filters that have been used for a muffler of automobiles, guns, and etc. To find out the sound transmission characteristic at the eardrum, we regarded an acoustic filter and external ear canal as a coupled system. So, we simulated the coupled system with OrCad, and experimented with a designed acoustic filter and a 2 cc coupler which has the same transmission characteristic as the external ear canal has. We confirmed that it is possible to adjustment acoustic transmission characteristics through simulation of electrical model for acoustic filter and external ear and experiments using designed small acoustic filters.

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References

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