不同激振位置对压电式人工中耳听力补偿性能的影响

发布时间：2018-07-03 02:11

本文选题：人工中耳 + 压电作动器　；参考：《中国生物医学工程学报》2017年04期

【摘要】：研究不同激振位置对压电式人工中耳听力补偿性能的影响,确定压电式人工中耳最优激振位置。建立人耳有限元模型,并通过和相关实验数据进行对比验证模型的可靠性。基于该模型,分别在鼓膜脐部、砧骨体、砧骨长突和圆窗施加相同的位移驱动,通过检测镫骨足底板位移及基底膜的最大位移,分析这些位置的激振对人工中耳听力补偿性能的影响。结果表明,以镫骨足底板位移为评估标准会低估圆窗激振的高频听力补偿效果。砧骨长突激振下的基底膜特征位置处的运动位移大于激振鼓膜脐部及激振砧骨体时的位移值,其中激振砧骨体时的基底膜特征位置处运动位移最小;激振圆窗时的基底膜特征位置处运动位移在低频段小于激振其他位置时对应的位移值,但在中、高频段其激振效果最好。在频率低于400 Hz时,砧骨长突激励听力补偿效果最好,圆窗激励听力补偿效果最差。当频率大于1 k Hz时,圆窗激励听力补偿效果比其他位置好。以传统的镫骨足底板响应为评估标准,将低估圆窗激振式人工中耳的听力补偿效果。
[Abstract]:The effect of different excitation positions on the hearing compensation performance of the piezoelectric artificial middle ear was studied, and the optimal excitation position of the piezoelectric artificial middle ear was determined. The finite element model of the human ear was established and the reliability of the model was compared with the relevant experimental data. Based on this model, the same model was applied to the drum, anvil, anvil and round window respectively. By measuring the displacement of the stapes and the maximum displacement of the basement membrane, the effect of the excitation on the hearing compensation performance of the middle ear was analyzed. The results showed that the high frequency hearing compensation effect was underestimated by the displacement of the stapes foot plate. The displacement is greater than the displacement of the umbilical cord and the exciting anvil body, in which the movement displacement of the basal membrane is minimum when the anvil is excited, and the displacement of the motion displacement at the characteristic position of the basement membrane in the circular window is less than that at the other position at the low frequency section, but in the middle, the frequency is the best. When the rate is below 400 Hz, the long process of the anvil has the best effect on hearing compensation, and the round window has the worst effect on hearing compensation. When the frequency is more than 1 K Hz, the effect of the circular window on hearing compensation is better than that of the other positions.
【作者单位】：中国矿业大学机电工程学院;上海交通大学机械系统与振动国家重点实验室;复旦大学附属中山医院耳鼻喉科;
【基金】：国家自然科学基金(51305442) 江苏省自然科学基金(BK20130194) 高等学校博士学科点专项科研基金(20130095120010)
【分类号】：R764

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