This report describes a torsional wave experiment used to measure the viscoelastic properties of vocal fold tissues and soft materials over the range of phonation frequencies. A thin cylindrical sample is mounted between two hexagonal plates. The assembly is enclosed in an environmental chamber to maintain the temperature and relative humidity at in vivo conditions. The bottom plate is subjected to small oscillations by means of a galvanometer driven by a frequency generator that steps through a sequence of frequencies. At each frequency, measured rotations of the top and bottom plates are used to determine the ratio of the amplitudes of the rotations of the two plates. Comparisons of the frequency dependence of this ratio with that predicted for torsional waves in a linear viscoelastic material allows the storage modulus and the loss angle, in shear, to be calculated by a best-fit procedure. Experimental results are presented for hydrogels that are being examined as potential materials for vocal fold regeneration.

中文翻译：

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用于声带再生的水凝胶粘弹性的高频测量

本报告描述了一个扭转波实验，用于测量声带组织和软材料在发声频率范围内的粘弹性。薄圆柱形样品安装在两个六边形板之间。该组件被封闭在环境室中，以保持体内条件下的温度和相对湿度。底板通过由频率发生器驱动的检流计进行小幅振荡，该频率发生器步进通过一系列频率。在每个频率下，测量的顶板和底板的旋转用于确定两个板的旋转幅度之比。将该比率的频率相关性与线性粘弹性材料中的扭转波预测的频率相关性的比较允许存储模量和损耗角，在剪切中，通过最佳拟合程序计算。展示了水凝胶的实验结果，这些水凝胶被检查为声带再生的潜在材料。