Funnell W R, Decraemer W F
Department of BioMedical Engineering, McGill University, Montréal, Québec, Canada,
J Acoust Soc Am. 1996 Aug;100(2 Pt 1):925-32. doi: 10.1121/1.416252.
The mechanical behavior of the eardrum has previously been shown to depend critically on its shape, but accurate shape measurements have been difficult to make. Phase-shift moiré topography provides a valuable technique for measuring such shapes, and measurement in the presence of large static pressures facilitates the determination of the boundaries of the pars tensa, pars flaccida, and manubrium. New measurements of the shape of the cat eardrum are presented. The presence of hysteresis in the pressure-displacement response is demonstrated. The shapes are incorporated in individualized finite-element models for four different ears, and the variability between and within animals is examined. Fixed-manubrium low-frequency displacements are simulated and compared for the different models.
此前已表明，耳膜的力学行为严重依赖于其形状，但精确的形状测量一直难以实现。相移莫尔条纹形貌术为测量此类形状提供了一种有价值的技术，在存在较大静压力的情况下进行测量有助于确定紧张部、松弛部和锤骨柄的边界。本文给出了猫耳膜形状的新测量结果。证明了压力 - 位移响应中存在滞后现象。将这些形状纳入四个不同耳朵的个体化有限元模型中，并研究了动物之间和动物内部的变异性。针对不同模型模拟并比较了固定锤骨柄的低频位移。
