Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 2nd International Conference on Biomedical Engineering and Biotechnology, 11–13 October 2013, Wuhan, China
Article type: Research Article
Authors: Woo, SeongTak | Jung, EuiSung | Lim, HyungGyu | Lee, Jang Woo | Seong, Ki Woong | Won, Chul Ho | Kim, Myoung Nam; | Cho, Jin Ho | Lee, Jyung Hyun;
Affiliations: Graduate School of Electrical Engineeing, Kyungpook National University, Sangyuk-dong, Buk-Gu, Daegu, 702-701, S. Korea | Department of Biomedical Engineering, Kyungpook National University Hospital, Dongin2-Ga, Jung-Gu, Daegu, 700-422, S. Korea | Department of High Tech. Medical System, Kyungil University, 50, Gamasil-Gil, Hayang-Eup, Gyeongsan, Gyeongbuk, 712-701, S. Korea | Graduate School of Medicine, Kyungpook National University, Dongin2-Ga, Jung-Gu, Daegu, 700-422, S. Korea | School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Sangyuk-dong, Buk-Gu, Daegu, 702-701, S. Korea
Note: [] Corresponding author. Jyung Hyun Lee. E-mail: pung@hmail.knu.ac.kr
Abstract: Input for fully implantable hearing devices (FIHDs) is provided by an implantable microphone under the skin of the temporal bone. However, the implanted microphone can be affected when the FIHDs user chews. In this paper, a dual implantable microphone was designed that can filter out the noise from mastication. For the in vivo experiment, a fabricated microphone was implanted in a rabbit. Pure-tone sounds of 1 kHz through a standard speaker were applied to the rabbit, which was given food simultaneously. To evaluate noise reduction, the measured signals were processed using a MATLAB program based adaptive filter. To verify the proposed method, the correlation coefficients and signal to-noise ratio before and after signal processing were calculated. By comparing the results, signal-to-noise ratio and correlation coefficients are enhanced by 6.07dB and 0.529 respectively.
Keywords: Implantable microphone, in vivo experiment, adaptive filter, Mastication, fully implantable hearing devices
DOI: 10.3233/BME-130828
Journal: Bio-Medical Materials and Engineering, vol. 24, no. 1, pp. 439-444, 2014
