Acoustic attenuation of a pulsed electroacoustic (PEA) signal is theoretically studied using the Kelvin-Voigt model for viscoelastic materials. Starting with the basics of viscoelasticity, we apply the model to an analysis of acoustic wave propagation in PEA systems. In experiments, low-density polyethylene films with three different thicknesses are used as PEA samples to verify the model. The transfer functions of the polymers in the PEA system are obtained on the basis of the viscoelastic theory with which we can calculate acoustic attenuation in polymer films. The calculated acoustic waveforms show good agreement with the measured one. Furthermore, we also demonstrate the waveform recovery using the transfer function.

中文翻译：

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声波在低密度聚乙烯中的衰减和色散分析


使用粘弹性材料的 Kelvin-Voigt 模型从理论上研究了脉冲电声 (PEA) 信号的声衰减。我们从粘弹性基础知识开始，将该模型应用于 PEA 系统中声波传播的分析。实验中采用三种不同厚度的低密度聚乙烯薄膜作为PEA样品来验证模型。 PEA 体系中聚合物的传递函数是根据粘弹性理论获得的，通过该理论我们可以计算聚合物薄膜中的声衰减。计算的声波波形与测量的声波波形非常吻合。此外，我们还演示了使用传递函数的波形恢复。