T0502-1-3 モルモットの蝸牛内におけるMEMS人工内耳基底膜の性能評価(マイクロ・ナノ領域におけるバイオ・熱流体の融合学術創成(1)バイオMEMS)

概要

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In this study, we developed a new artificial basilar membrane (ABM) for an animal test using guinea pigs. The geometrical configuration of ABM is designed to be fitted to the cochlea. ABM is fabricated by the microelectromechanical systems and the thin film technologies. The basic vibrating characteristics under the fluid-structure interaction are investigated using the laser Doppler vibrometer(LDV). The result indicates that ABM has a resonant frequency of 37.6 kHz, however, the frequency selectivity is not realized. To analyze the vibrating behavior in detail, the amplitude distribution along the transversal direction of ABM is compared with that of an analytical solution for a vibrating beam. From the reasonable agreement between them, it is confirmed that bending vibration is dominant in the vibration of developed ABM. The basic knowledge on designing ABM is accumulated.
2009-09-12