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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Integrated Photogrammetric-Acoustic Technique for Qualitative Analysis of the Performance of Acoustic Screens in Sandy Soils
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Integrated Photogrammetric-Acoustic Technique for Qualitative Analysis of the Performance of Acoustic Screens in Sandy Soils

机译：定性分析沙质土壤声屏性能的综合照相声学技术

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摘要

In this work, we present an integrated photogrammetric-acoustic technique that, together with the construction of a scaled wind tunnel, allows us to experimentally analyze the permeability behavior of a new type of acoustic screen based on a material called sonic crystal. Acoustic screens are devices used to reduce noise, mostly due to communication infrastructures, in its transmission phase from the source to the receiver. The main constructive difference between these new screens and the classic ones is that the first ones are formed by arrays of acoustic scatterers while the second ones are formed by continuous walls. This implies that, due to their geometry, screens based on sonic crystals are permeable to wind and water, unlike the classic ones. This fact may allow the use of these new screens in sandy soils, where sand would pass through the screen, avoiding the formation of sand dunes that are formed in classic screens and drastically reducing their acoustic performance. In this work, the movement of the sand and the resulting acoustic attenuation in these new screens are analyzed qualitatively, comparing the results with those obtained with the classic ones, and obtaining interesting results from the acoustic point of view.
机译：在这项工作中，我们提出了一种综合的摄影声学技术，该技术与缩放风洞的构建一起，使我们能够通过实验分析基于一种名为声波晶体的材料的新型声屏的渗透性能。声屏是用于在从源到接收器的传输阶段减少噪声的设备，主要是由于通信基础设施。这些新屏幕与经典屏幕之间的主要建设性区别在于，第一个屏幕由声散射体阵列形成，而第二个屏幕由连续墙形成。这意味着基于声波晶体的几何形状，与传统的不同，基于声晶体的屏幕对风和水具有渗透性。这一事实可能允许在沙质土壤中使用这些新的筛网，因为沙子会穿过筛网，从而避免了传统筛网中形成的沙丘形成，并极大地降低了其隔音性能。在这项工作中，定性地分析了这些新筛子中的沙子运动和由此产生的声衰减，将结果与传统筛子的结果进行了比较，并从声学角度获得了有趣的结果。

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