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http://dx.doi.org/10.9718/JBER.2008.29.1.059

Design and Fabrication of an Implantable Microphone for Reduction of Skin Damping Effect through FEA Simulation  

Han, Ji-Hun (School of Electrical Engineering and Computer Science, Kyungpook National University)
Kim, Min-Woo (School of Electrical Engineering and Computer Science, Kyungpook National University)
Kim, Dong-Wook (School of Electrical Engineering and Computer Science, Kyungpook National University)
Seong, Ki-Woong (School of Electrical Engineering and Computer Science, Kyungpook National University)
Cho, Sung-Mok (Department of Information Security, Tongmyong University)
Park, Il-Yong (Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University)
Cho, Jin-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University)
Publication Information
Journal of Biomedical Engineering Research / v.29, no.1, 2008 , pp. 59-65 More about this Journal
Abstract
Nowadays, implantable hearing aids have been developed to solve the problems of conventional hearing aids. In case of fully implantable hearing aids, an implantable microphone is necessary to receive sound signal beneath the skin. Normally, an implantable microphone has poor frequency response characteristics in high frequency bands of acoustic signal due to the high frequency attenuation effect of skin after implantation to human body. In this paper, the implantable microphone is designed to reduce the high frequency attenuation effect of a skin by putting its resonance frequency at the attenuated range through a finite element analysis (FEA) simulation. The designed implantable microphone through the simulated results has been fabricated by manufacturing process using bio-compatible materials. By the several in-vitro experiments with pig skin, it has been verified that the designed implantable microphone has a resonance frequency around the starting part of the attenuated range and reduces the attenuation effect.
Keywords
fully implantable hearing aids; Implantable microphone; damping effect; FEA;
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