Acoustics recordings from laser-induced plasmas are becoming increasingly regarded as a complementary source of information from the inspected sample. The propagation of these waves is susceptible to be modified by the physicochemical traits of the sample, thus yielding specific details that can be used for sorting and identification of targets. Still, the relative fragility of the acoustic wave poses major challenges to the applicability of laser-induced acoustics. Echoes and reflections sourcing from intrasample parameters as well as from interactions of the acoustic wave with the surroundings of the inspected target can dilute the analytical information directly related to the object contained within the recordings. The present work aims to experimentally scrutinize the impact of different parameters internal and external to the sample into the final acoustic signal from laser-induced plasmas in order to accurately use this information source for characterization purposes. Variables inherent to the sample such as dimensions, porosity and absorption coefficient, which guides the laser-matter coupling process, have been, for the first time, systematically studied using ad-hoc solids to thoroughly isolate their influence on the signal. Moreover, modulation of soundwave induced by the surroundings of the probed target and the anisotropy of the acoustic signal because of the angle at which the plasma is formed, have been evaluated.

来自激光诱导等离子体的声学记录越来越被视为来自被检查样品的信息的补充来源。这些波的传播容易受到样品的物理化学特征的影响，从而产生可用于分类和识别目标的特定细节。尽管如此，声波的相对脆弱性对激光诱导声学的适用性提出了重大挑战。来自样本内参数以及声波与被检查目标周围环境的相互作用的回波和反射可以稀释与记录中包含的对象直接相关的分析信息。目前的工作旨在通过实验检查样品内部和外部不同参数对来自激光诱导等离子体的最终声学信号的影响，以便准确地使用该信息源进行表征。样品固有的变量，如尺寸、孔隙率和吸收系数，指导激光​​-物质耦合过程，首次使用特设固体系统地研究，以彻底隔离它们对信号的影响。此外，已经评估了由探测目标周围环境引起的声波调制以及由于形成等离子体的角度而导致的声信号的各向异性。样品固有的变量，如尺寸、孔隙率和吸收系数，指导激光​​-物质耦合过程，首次使用特设固体系统地研究，以彻底隔离它们对信号的影响。此外，已经评估了由探测目标周围环境引起的声波调制以及由于形成等离子体的角度而导致的声信号的各向异性。样品固有的变量，如尺寸、孔隙率和吸收系数，指导激光​​-物质耦合过程，首次使用特设固体系统地研究，以彻底隔离它们对信号的影响。此外，已经评估了由探测目标周围环境引起的声波调制以及由于形成等离子体的角度而导致的声信号的各向异性。