首页> 外文期刊>Journal of voice: official journal of the Voice Foundation >Vocal fold elasticity in the pig, sheep, and cow larynges.
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Vocal fold elasticity in the pig, sheep, and cow larynges.

机译:猪,绵羊和牛喉中的声带弹性。

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摘要

Elastic characteristics of the pig, sheep, and cow vocal folds were investigated through a series of in vitro experiments. Sample strips of the vocal-fold tissue were dissected from pig, sheep, and cow vocal folds and mounted inside a saline-filled ergometer chamber that was maintained at 37 degrees C +/- 1 degrees C. Sinusoidal elongation was applied on the samples to obtain the passive force measurements. Force and elongation data from the samples were recorded electronically with a dual-servo system (ergometer). Stress-Strain data were compared to characterize the interspecies differences in the elastic properties of vocal folds. Pig vocal folds exhibited the most nonlinear stress-strain relationship, indicating the presence of a high level of collagen fibers. Cow vocal folds had the highest Young's modulus, but the tissue displayed a nearly linear stress-strain profile. Previous studies of phonation in these three species have indicated that pig larynges have the highest range of phonation frequencies, making them a good candidate for animal studies. The current study provides quantitative data for the elastic properties of the oscillating laryngeal tissue in these species and indicates that nonlinear behavior of these tissues may lead to wider oscillation ranges.
机译:通过一系列体外实验研究了猪,绵羊和牛声带的弹性特征。从猪,绵羊和牛的声带上切下声带组织的样品条,并安装在保持37℃+/- 1℃的充满盐水的测力计室内。将正弦伸长施加到样品上获得被动力测量值。用双伺服系统(测力计)以电子方式记录样品的力和伸长率数据。比较了应力应变数据,以表征声带弹性特性的种间差异。猪的声带表现出最非线性的应力-应变关系,表明存在高水平的胶原纤维。牛的声带具有最高的杨氏模量,但组织显示出几乎线性的应力应变曲线。先前对这三个物种的发声研究表明,猪喉具有最大的发声频率范围,使其成为动物研究的理想选择。当前的研究为这些物种中的振荡喉组织的弹性特性提供了定量数据,并表明这些组织的非线性行为可能导致更宽的振荡范围。

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