Abstract

The ability of focus waves with concave or convex surfaces is well known both in optics and in acoustics. Nowadays, the possibility of beamforming sound with flat lenses is a hot topic because of its application in different areas such as biomedical engineering or non-destructive techniques. In this paper, we propose a gas filled cuboid lens that has a different sound speed than that of the surrounding medium (air in our case) as a beamforming acoustic device. This constitutes an experimental visualization of the capability of sound focusing with flat surfaces lens and allows understanding the corresponding physic phenomenon.

中文翻译：

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CO 2填充长方体的聚焦能力

摘要

具有凹面或凸面的聚焦波的能力在光学和声学上都是众所周知的。如今，由于平板透镜在生物医学工程或非破坏性技术等不同领域中的应用，利用平板透镜对声音进行波束成形的可能性成为一个热门话题。在本文中，我们提出了一种气体填充的长方体透镜，它的声速与周围介质（在我们的情况下为空气）的声速不同，是一种波束成形声学装置。这构成了使用平面透镜聚焦声音的能力的实验可视化，并且可以了解相应的物理现象。