Alps-Adriatic University of Klagenfurt, Chair of Applied Mechatronics, Austria.
J Biomech. 2010 May 28;43(8):1540-5. doi: 10.1016/j.jbiomech.2010.01.035. Epub 2010 Mar 1.
A measurement setup combined with a Finite Element (FE) simulation is presented to determine the elasticity modulus of soft materials as a function of frequency. The longterm goal of this work is to measure in vitro the elasticity modulus of human vocal folds over a frequency range that coincides with the range of human phonation. The results will assist numerical simulations modeling the phonation process by providing correct material parameters. Furthermore, the measurements are locally applied, enabling to determine spatial differences along the surface of the material. In this work the method will be presented and validated by applying it to silicones with similar characteristics as human vocal folds. Three silicone samples with different consistency were tested over a frequency range of 20-250 Hz. The results of the pipette aspiration method revealed a strong frequency dependency of the elasticity modulus, especially below 100 Hz. In this frequency range the elasticity moduli of the samples varied between 5 and 27 kPa.
提出了一种结合有限元（FE）模拟的测量设置，以确定软材料的弹性模量作为频率的函数。这项工作的长期目标是在与人类发声范围相吻合的频率范围内测量人声带的体外弹性模量。结果将通过提供正确的材料参数来协助对发声过程进行数值模拟。此外，测量是局部应用的，能够确定材料表面沿表面的空间差异。在这项工作中，该方法将通过应用于与人声带具有相似特性的硅酮来进行介绍和验证。对三种不同稠度的硅酮样本在 20-250 Hz 的频率范围内进行了测试。吸移管法的结果显示，弹性模量具有很强的频率依赖性，特别是在 100 Hz 以下。在这个频率范围内，样品的弹性模量在 5 到 27 kPa 之间变化。
