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http://dx.doi.org/10.5369/JSST.2009.18.4.286

Measurement of transmitted vibration to stapes and tympanic membrane by DFMT's vibration in implantable middle ear hearing devices  

Lee, Myoung-Won (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Seong, Ki-Woong (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Lim, Hyung-Gyu (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Kim, Min-Woo (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Jung, Eui-Sung (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Lee, Jang-Woo (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Kim, Dong-Wook (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Lee, Jyung-Hyun (Department of Biomedical Engineering, Kyungpook National University Hospital)
Lee, Sang-Heun (Otolaryngology, School of Medicine, Kyungpook National University)
Lee, Kyu-Yup (Otolaryngology, School of Medicine, Kyungpook National University)
Cho, Jin-Ho (Graduate School of Electrical Engineering and Computer Science, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.18, no.4, 2009 , pp. 286-293 More about this Journal
Abstract
The implantable middle ear hearing devices(IMEHDs) have been developed to overcome the conventional hearing aid's problem(ringing effect caused by the acoustic feedback, cosmetic problem, etc.). In the IMEHDs, the vibrating transducer is a key component because its vibration enables to hear for hearing impaired people. The vibrating transducer is implanted on ossicular chain by surgical operation. The coupling status between implanted transducer and ossicular chain has an effect on delivering vibrating force from transducer to stapes. Noninvasive method is required to investigate the output characteristics of IMEHDs after implementation. Recently, emitted sound pressure measuring method of tympanic membrane is proposed to investigate the output characteristics of IMEHDs. However, the relationship between displacement of stapes and sound pressure by tympanic membrane was not cleared. In this paper, displacement of stapes and sound pressure by tympanic membrane were measured using the differential floating mass transducer(DFMT) that implanted on the ossicular chain of the human temporal bone and physical ear model. Through the experiments results, the relationship between displacement of stapes and sound pressure by tympanic membrane was investigated.
Keywords
implantable middle ear hearing device(IMEHD); differential floating mass transducer(DFMT); vibration; displacement; footplate of stapes; emittied sound pressure;
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