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http://dx.doi.org/10.5369/JSST.2005.14.5.322

Proposal of a piezoelectric floating mass transducer for implantable middle ear hearing devices  

Lee, Chang-Woo (School of Electrical Engineering & Computer Science, Kyungpook National University)
Kim, Min-Kyu (Dept. of Medical & Biological Engineering, Graduate School, Kyungpook National University)
Park, Il-Yong (Advanced Research Center for Recovery of Human Sensibility, Kyungpook National University)
Song, Byung-Seop (Dept. of Rehabilitation Science & Technology, School of Rehabilitation Science, Daegu University)
Roh, Yong-Rae (School of Mechanical Engineering, Kyungpook National University)
Cho, Jin-Ho (School of Electrical Engineering & Computer Science, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.14, no.5, 2005 , pp. 322-330 More about this Journal
Abstract
A new type of transducer, piezoelectric floating mass transducer (PFMT) which has advantages of piezoelectric and electromagnetic transducer has been proposed and implemented for the implantable middle ear hearing devices. By the uneven bonding of piezoelectric material to the inner bottom of transducer case, the PFMT can vibrate back-and-forth along the longitudinal axis of the transducer even though the piezoelectric material within the cylindrical case produces only the bilateral expansion and contraction according to the applied electrical signal. To improve efficiency of the PFMT, the multi-layered piezoelectric material has been adapted. The small number of components in the PFMT enables the simple manufacturing and the easy implanting into the middle ear. In order to examine the characteristics of vibration, mechanical modeling and finite element analyses of the proposed transducer have been performed. From the result of theoretical analyses and the measured data from the experiment, it is verified that the implemented PFMT can be used in implantable middle ear hearing devices.
Keywords
PFMT; piezoelectric; FEA; displacement; implantable middle ear;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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