Technological advancements are continuously changing the paradigm of human existence.Human beings are constantly engaging in various measures to reduce the extent of sensory and motor impairment.This has been in the f...Technological advancements are continuously changing the paradigm of human existence.Human beings are constantly engaging in various measures to reduce the extent of sensory and motor impairment.This has been in the form of various devices,e.g.orthopedic prosthesis,visual aids (spectacles) and hearing aids.Countless attempts throughout the centuries have been made in an effort to improve sound amplification in patients.This article seeks to highlights the technological journey of one such implant,the middle ear implant,from its inception to the more technological advanced futuristic proposals.While there are many amplification devices available presently,there still remains a group of patients who have not experienced adequate amplification for their hearing loss and this subset may gain the greatest benefit from middle ear implants.展开更多
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,...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。展开更多
目的研究采用传统基底膜位移评价标准评估圆窗激振式人工中耳听力补偿性能的准确性,为圆窗激振式人工中耳的性能评估提供理论基础。方法基于耳蜗几何结构的实验数据,建立耳蜗感声微观有限元模型,通过对比内听毛细胞、外听毛细胞、盖膜...目的研究采用传统基底膜位移评价标准评估圆窗激振式人工中耳听力补偿性能的准确性,为圆窗激振式人工中耳的性能评估提供理论基础。方法基于耳蜗几何结构的实验数据,建立耳蜗感声微观有限元模型,通过对比内听毛细胞、外听毛细胞、盖膜等部位位移响应的实验测量值,验证模型的可靠性。基于该模型,对比分析正向激振、圆窗激振下的基底膜位移与内听毛细胞静纤毛剪切位移;以内听毛细胞静纤毛剪切位移作为感声标准,研究圆窗激振时采用传统人工中耳基底膜评价标准的等效声压级偏差。结果在所研究耳蜗微段对应的5 k Hz特征频率处,相同幅值的声压作用下,圆窗激振的基底膜位移和内听毛细胞静纤毛剪切位移均小于正向激振的对应值。结论正向激振下的内听毛细胞更兴奋,感声效果更强。同时,采用正向激振的基底膜位移评价方法评估圆窗激振的听力补偿效果,会高估圆窗激振的听力补偿性能;但偏差较小,是一种相对可靠的评价方法。展开更多
文摘Technological advancements are continuously changing the paradigm of human existence.Human beings are constantly engaging in various measures to reduce the extent of sensory and motor impairment.This has been in the form of various devices,e.g.orthopedic prosthesis,visual aids (spectacles) and hearing aids.Countless attempts throughout the centuries have been made in an effort to improve sound amplification in patients.This article seeks to highlights the technological journey of one such implant,the middle ear implant,from its inception to the more technological advanced futuristic proposals.While there are many amplification devices available presently,there still remains a group of patients who have not experienced adequate amplification for their hearing loss and this subset may gain the greatest benefit from middle ear implants.
文摘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。
文摘目的研究采用传统基底膜位移评价标准评估圆窗激振式人工中耳听力补偿性能的准确性,为圆窗激振式人工中耳的性能评估提供理论基础。方法基于耳蜗几何结构的实验数据,建立耳蜗感声微观有限元模型,通过对比内听毛细胞、外听毛细胞、盖膜等部位位移响应的实验测量值,验证模型的可靠性。基于该模型,对比分析正向激振、圆窗激振下的基底膜位移与内听毛细胞静纤毛剪切位移;以内听毛细胞静纤毛剪切位移作为感声标准,研究圆窗激振时采用传统人工中耳基底膜评价标准的等效声压级偏差。结果在所研究耳蜗微段对应的5 k Hz特征频率处,相同幅值的声压作用下,圆窗激振的基底膜位移和内听毛细胞静纤毛剪切位移均小于正向激振的对应值。结论正向激振下的内听毛细胞更兴奋,感声效果更强。同时,采用正向激振的基底膜位移评价方法评估圆窗激振的听力补偿效果,会高估圆窗激振的听力补偿性能;但偏差较小,是一种相对可靠的评价方法。
