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首页> 美国卫生研究院文献>Materials >Simulations and Measurements of Human Middle Ear Vibrations Using Multi-Body Systems and Laser-Doppler Vibrometry with the Floating Mass Transducer
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Simulations and Measurements of Human Middle Ear Vibrations Using Multi-Body Systems and Laser-Doppler Vibrometry with the Floating Mass Transducer

机译：使用多体系统和带有浮动质量传感器的激光多普勒振动测定法模拟和测量人中耳的振动

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摘要

The transfer characteristic of the human middle ear with an applied middle ear implant (floating mass transducer) is examined computationally with a Multi-body System approach and compared with experimental results. For this purpose, the geometry of the middle ear was reconstructed from μ-computer tomography slice data and prepared for a Multi-body System simulation. The transfer function of the floating mass transducer, which is the ratio of the input voltage and the generated force, is derived based on a physical context. The numerical results obtained with the Multi-body System approach are compared with experimental results by Laser Doppler measurements of the stapes footplate velocities of five different specimens. Although slightly differing anatomical structures were used for the calculation and the measurement, a high correspondence with respect to the course of stapes footplate displacement along the frequency was found. Notably, a notch at frequencies just below 1 kHz occurred. Additionally, phase courses of stapes footplate displacements were determined computationally if possible and compared with experimental results. The examinations were undertaken to quantify stapes footplate displacements in the clinical practice of middle ear implants and, also, to develop fitting strategies on a physical basis for hearing impaired patients aided with middle ear implants.
机译：使用多体系统方法对使用中耳植入物（浮动质量传感器）的人中耳的传输特性进行了计算检查，并与实验结果进行了比较。为此，从μ计算机断层扫描切片数据重建了中耳的几何形状，并准备进行多体系统仿真。浮动质量传感器的传递函数是输入电压与所产生的力之比，是根据物理环境得出的。通过多体系统方法获得的数值结果与通过激光多普勒测量五个不同样本的sta骨踏板速度的实验结果进行了比较。尽管在计算和测量中使用了略有不同的解剖结构，但发现骨足板沿频率位移的过程具有高度对应性。值得注意的是，在低于1 kHz的频率处出现了一个陷波。另外，如果可能的话，通过计算确定骨足踏板位移的相位过程，并将其与实验结果进行比较。在中耳植入物的临床实践中进行了这项检查，以量化foot骨足板的位移，并且还为在物理基础上为患有中耳植入物的听力障碍患者制定适合的策略。

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