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http://dx.doi.org/10.9717/kmms.2020.23.8.1040

A Parameter Study on the Frequency Characteristics Control of Implantable Bone Conduction Transducer Using FEA  

Shin, Dong Ho (Institute of Biomedical Engineering, Research, Kyungpook National University)
Kim, Myoung Nam (Department of Biomedical Engineering, School of Medicine, Kyungpook National University)
Publication Information
Journal of Korea Multimedia Society / v.23, no.8, 2020 , pp. 1040-1048 More about this Journal
Abstract
In this study, in order to improve the implantable bone conduction transducer of the prototype proposed by Shin et al., the effect of the element parameters of the transducer on the frequency characteristics was analyzed using electromagnetic and mechanical vibration analysis. Electromagnetic analysis was performed on the size of the permanent magnet and the distance between the metal plate and the coil to derive an optimal structure that generates the maximum Lorentz force. In addition, mechanical vibration analysis was performed on the cantilever structure of the vibrational membrane in order to minimize the distortion of the transducer and to have a frequency characteristic suitable for conductive hearing loss compensation. The frequency characteristics of the transducer of the optimal structure derived through finite element method were compared with the simulation results of the previous transducer. As a result, the output magnitude (displacement) of the transducer designed with the optimal structure generated an average 8.8 times higher than the previous transducer, and the resonance frequency was generated at 0.9 kHz.
Keywords
Bone Conduction Implant; Transducer; Finite Element Analysis; Vibrational Membrane; Resonance Frequency;
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