Analytical modeling of one-dimensional resonant asymmetric and reciprocal acoustic structures as Willis materials
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Other documents of the author: Groby, Jean-Philippe; Malléjac, Matthieu; Merkel, Aurélien; Romero-García, Vicent; TOURNAT, Vincent; Torrent, Daniel; Li, Jensen
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comunitat-uji-handle2:10234/43662
comunitat-uji-handle3:10234/43643
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Title
Analytical modeling of one-dimensional resonant asymmetric and reciprocal acoustic structures as Willis materialsAuthor (s)
Date
2021-05-14Publisher
IOP PublishingBibliographic citation
Groby, J. P., Malléjac, M., Merkel, A., Romero-García, V., Tournat, V., Torrent, D., & Li, J. (2021). Analytical modeling of one-dimensional resonant asymmetric and reciprocal acoustic structures as Willis materials. New Journal of Physics, 23(5), 053020.Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
As building blocks of acoustic metamaterials, resonant scatterers have demonstrated their ability to modulate the effective fluid parameters, which subsequently possess extreme properties such as negative bulk modulus ... [+]
As building blocks of acoustic metamaterials, resonant scatterers have demonstrated their ability to modulate the effective fluid parameters, which subsequently possess extreme properties such as negative bulk modulus or negative mass density. Promising applications have been shown such as extraordinary absorption, focusing, and abnormal refraction for instance. However, acoustic waves can be further controlled in Willis materials by harnessing the coupling parameters. In this work, we derive the closed forms of the effective parameters from the transfer matrix in three asymmetric and reciprocal one-dimensional resonant configurations and exhibit the differences in terms of coupling coefficients. The way in which Willis coupling occurs in spatially asymmetric unit cells is highlighted. In addition, the analysis shows the absence of odd Willis coupling for reciprocal configurations. These effective parameters are validated against experimental and numerical results in the three configurations. This article paves the way of a novel physical understanding and engineering use of Willis acoustic materials. [-]
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New Journal of Physics, Vol. 23 (May 2021)Funder Name
ANR-RGC METARoom project
Project code
ANR-18-CE08-0021
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