KMID : 1137820090300020162
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ÀÇ°øÇÐȸÁö 2009 Volume.30 No. 2 p.162 ~ p.168
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Lumped Mechanical Model of Electromagnetic Floating Mass Transducer Implanted on Human Middle Ear
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Seong Ki-Woong
Kim Min-Woo Lee Jang-Woo Lim Hyung-Gyu Jung Eui-Sung Kim Dong-Wook Lee Myung-Won Lee Jung-Hyun Kim Myoung-Nam Park Il-Yong Cho Jin-Ho
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Abstract
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Implantable middle ear hearing devices (IMEHDs) have been widely studied as an alternative hearing aids to solve the problems of conventional hearing aids. Vibration transducer of middle ear hearing aids is a key component because vibration characteristics of transducer is directly involved performance of hearing aids. So, the study about middle ear hearing aids concentrate on the transducers. A floating mass type transducer is most efficient. In this paper, we suggest a lumped mechanical model of electromagnetic floating mass transducer implanted on human middle ear. The proposed model enables analysis of the vibration characteristics of a floating mass transducer and prediction of the variation after implant on ossicle that offers a simple and easy to analyze. The parameters was drawn based on the components and the structures of transducer. The Lumped mechanical model was converted by the electrical-mechanical equivalent model, and simulated using PSpice. So, we investigated vibration characteristics of transducer influenced it¡¯s components. And we predict vibration characteristics of stapes footplate due to implanted transducer¡¯s vibration using combining model of transducer and human ear. To prove the feasibility of the suggested model, we fabricated a differential floating mass transducer (DFMT) as one of floating mass transducers and performed experiments using the human temporal bones.
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KEYWORD
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lumped model, electrical model, floating mass transducer, DFMT
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