A new look at multiple scattering in the presence of porous materials

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• Jean-Philippe Groby (CNRS (Centre national de la recherche scientifique))
• Thursday 25 May 2023, 11:35-12:20
• Seminar Room 1, Newton Institute.

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MWSW04 - Multiple scattering in engineering and applied sciences

A 3 -dimensional fully natural sonic crystal composed of Aegagropilae, that are spherical aggregates resulting from the decomposition of Posidonia Oceanica, is first analyzed. This fully natural sonic crystal exhibits excellent sound absorbing properties and thus represents a sustainable alternative that could outperform conventional acoustic material. New insight into metaporous surface involving periodically arranged square shaped 2D Helmholtz resonators would then be given. In particular, the closed-form expressions of the effective properties of these 2D-dimensional metaporous materials are derived, including the Willis coupling. Co-authors: L. Barguet, J. Leng, V. Romero-García, G. Gabard, N. Jiménez, L.M. Garcia-Raffi, V. J. Sánchez-Morcillo, D. Torrent, and  J. Li

This talk is part of the Isaac Newton Institute Seminar Series series.

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