2020
DOI: 10.3390/s20216148
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Directional Ultrasound Source for Solid Materials Inspection: Diffraction Management in a Metallic Phononic Crystal

Abstract: In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an “ultrasonic lens”, providing self-collimation or focusing effect at a certain distance from the crystal output. We implement this directional propagation in the design of a coupling device capable to control the directivity or focusing of ultrasonic waves propagation inside a target object. These effects are r… Show more

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Cited by 3 publications
(1 citation statement)
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“…The coupling system provides a useful exploration method for vibration and sound suppression, acoustic hypersensitivity, energy location identification and the harvest of the elastic wave. On account of the research interests previously mentioned, numerous PnC structures are proposed in this article to improve energy-harvesting efficiency [ 9 , 10 , 11 ].…”
Section: Introductionmentioning
confidence: 99%
“…The coupling system provides a useful exploration method for vibration and sound suppression, acoustic hypersensitivity, energy location identification and the harvest of the elastic wave. On account of the research interests previously mentioned, numerous PnC structures are proposed in this article to improve energy-harvesting efficiency [ 9 , 10 , 11 ].…”
Section: Introductionmentioning
confidence: 99%