In this work, dispersive wave propagation in plant leaves is studied using a long distance laser-based ultrasonic method. Guided waves traveling through and along the midrib, as well as in the lamina, are measured and analyzed via wave attenuation, characteristic diagram and dispersion curves. Additionally, an estimation of the leaf elastic properties using the Rayleigh–Lamb model, supported by thickness-resonance frequency constraints, is proposed. This study paves the way for the development of acoustic fingerprints for the identification of leaves and their non-invasive and fairly non-destructive mechanical characterization, which is highly related to the plant hydraulics and photosynthetic activity.

在这项工作中，使用基于激光的长距离超声方法研究了植物叶片中的色散波传播。通过波的衰减，特征图和色散曲线，测量并分析通过和沿着中脉以及在椎板中传播的导波。另外，提出了在厚度共振频率约束的支持下，利用瑞利-兰姆模型对叶片弹性特性的估计。这项研究为开发用于识别叶片及其非侵入性和相当无损的机械特性的声学指纹图铺平了道路，这与植物的水力学和光合作用活动高度相关。