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http://dx.doi.org/10.5369/JSST.2012.21.2.144

The Design of Temporal Bone Type Implantable Microphone for Reduction of the Vibrational Noise due to Masticatory Movement  

Woo, Seong-Tak (Graduate School of Electrical Engineering, and Computer Science, Kyungpook National University)
Jung, Eui-Sung (Institute of Biomedical Engineering Research, Kyungpook National University)
Lim, Hyung-Gyu (Graduate School of Electrical Engineering, and Computer Science, Kyungpook National University)
Lee, Yun-Jung (Graduate School of Medical and Biological Engineering, Kyungpook National University)
Seong, Ki-Woong (Department of Biomedical Engineering, Kyungpook National University Hospital)
Lee, Jyung-Hyun (Department of Biomedical Engineering, Kyungpook National University Hospital)
Cho, Jin-Ho (Graduate School of Electrical Engineering, and Computer Science, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.21, no.2, 2012 , pp. 144-150 More about this Journal
Abstract
A microphone for fully implantable hearing device was generally implanted under the skin of the temporal bone. So, the implanted microphone's characteristics can be affected by the accompanying noise due to masticatory movement. In this paper, the implantable microphone with 2-channels structure was designed for reduction of the generated noise signal by masticatory movement. And an experimental model for generation of the noise by masticatory movement was developed with considering the characteristics of human temporal bone and skin. Using the model, the speech signal by a speaker and the artificial noise by a vibrator were supplied simultaneously into the experimental model, the electrical signals were measured at the proposed microphone. The collected signals were processed using a general adaptive filter with least mean square(LMS) algorithm. To confirm performance of the proposed methods, the correlation coefficient and the signal to noise ratio(SNR) before and after the signal processing were calculated. Finally, the results were compared each other.
Keywords
Moving Artifact; Implantable Microphone; Fully Implantable Hearing Device; Masticatory Movement; Dual Microphone;
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Times Cited By KSCI : 1  (Citation Analysis)
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