Funnell W R
Department of BioMedical Engineering, McGill University, Montréal, QC, Canada.
J Acoust Soc Am. 1996 May;99(5):3036-43. doi: 10.1121/1.414875.
The mechanical coupling between the eardrum and the manubrium was studied by means of a finite-element model of the cat eardrum. Previous calculations of the effect of varying the eardrum curvature were extended, demonstrating the critical role of curvature in the behavior of the eardrum. A new procedure was developed for directly studying the coupling of forces from different points on the eardrum to the manubrium, and the distribution of load-coupling values over the eardrum surface was calculated. A geometrically simplified eardrum with a circular outline was also studied. It was found that certain regions of the eardrum are more effective in driving the manubrium than can be explained on the basis of their distance from the axis of rotation. This enhanced coupling depends on the curvature of the eardrum but, unlike the mechanism hypothesized by Helmholtz, requires neither tension nor anisotropy.
通过猫鼓膜的有限元模型研究了鼓膜与锤骨柄之间的机械耦合。之前关于改变鼓膜曲率影响的计算得到了扩展，证明了曲率在鼓膜行为中的关键作用。开发了一种新方法，用于直接研究鼓膜上不同点的力与锤骨柄的耦合，并计算了鼓膜表面负载耦合值的分布。还研究了具有圆形轮廓的几何简化鼓膜。结果发现，鼓膜的某些区域在驱动锤骨柄方面比基于它们到旋转轴的距离所能解释的更有效。这种增强的耦合取决于鼓膜的曲率，但与亥姆霍兹假设的机制不同，既不需要张力也不需要各向异性。
