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http://dx.doi.org/10.5369/JSST.2002.11.3.171

Design of High Efficiency Differential Electromagnetic Type Transducer for Implantable Middle Ear System  

Song, Byung-Seop (Sensor Technology Research Center, Kyungpook National University)
Ro, Chul-Kyun (Department of Control & Instrumentation Eng., Kyungil University)
Kim, Myoung-Nam (Department of Biomedical Engineering, School of Medicine, Kyungpook National University)
Cho, Jin-Ho (Department of Biomedical Engineering, School of Medicine, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.11, no.3, 2002 , pp. 171-182 More about this Journal
Abstract
The differential electromagnetic transducer for IME(implantable middle ear) system, which have two small permanent magnets glued with the same pole facing each other in the coil, has high vibration efficiency and does not influenced by external magnetic field. In this paper, using finite element method, highly efficient structure of the transducer was proposed and vibration force of the transducer was calculated by electromagnetic theory. And the necessary vibration force of transducer to transmit the sound signal to inner ear when the transducer is attached at stapes was calculated and the design parameters of the transducer were investigated. Using the parameters, the differential electromagnetic transducer was manufactured in small size to implant in confined human middle ear. And it was examined by unloaded and loaded vibration experiment using temporal bone sampled from cadaver.
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