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《Journal of Vibration and Shock》 2011-07
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Design of a new type of piezoelectric actuator for middle ear implant

LIU Hou-guang,TA Na,RAO Zhu-shi(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China)  
A piezoelectric stack actuator for incus driving type middle ear implant was proposed and designed.To aid the design,a coupled mechanical model between a human middle ear and a piezoelectric stack actuator was constructed.This model was built based on a complete set of computerized tomography section images of a healthy volunteer's left ear with reverse engineering technology.The result showed that the stapes footplate displacement stimulated with the designed piezoelectric stack actuator's excitation at 10.5 V rms is equivalent to that from acoustic stimulation at 90 dB SPL,adequate to the ossicular chain;the corresponding power consumption is 0.03 mW per volt of excitation at 1 kHz,low enough to meet the requirements of a middle ear implant.
【Fund】: 国家自然科学基金(10772121);; 上海交通大学医工交叉研究基金(YG2007MS14)
【CateGory Index】: TH785.1
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