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.
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Funding
This work was financially supported by the Spanish MINECO through project TEC2015-70939-R and partially was carried out within the framework of the Tomsk Polytechnic University Competitiveness Enhancement Program, Russia. D.T.-S. acknowledges financial support from Ministerio de Ciencia, Innovación y Universidades de España through grant BES-2016-077133.
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Tarrazó-Serrano, D., Rubio, C., Minin, O.V. et al. Sound Focusing Capability of a CO2 Gas-Filled Cuboid. Phys. Wave Phen. 28, 333–337 (2020). https://doi.org/10.3103/S1541308X2004010X
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DOI: https://doi.org/10.3103/S1541308X2004010X