LMA - Laboratoire de Mécanique et d’Acoustique

R. Fleury - Introduction to topological acoustics and examples with 1D and 2D metamaterials

Amphithéâtre François Canac, LMA

Le 22 novembre 2022 de 11h00 à 12h00

Romain Fleury / Assistant Professor Waves Engineering Lab, EPFL

In this talk, I will discuss why topology, a branch of mathematics not often covered in the curricula of acousticians, can nevertheless play an important role in the control of acoustic resonances and scattering. After an introductory crash course on homotopy, I will provide a few simple examples where natural acoustic properties can be better understood through the lens of topology. I will then explain how it is possible to engineer the topology of acoustic systems, leveraging architected topological materials to turn an otherwise sensitive acoustic effect, such as transmission poles or zeros, into something robust and topologically-protected. Experiments and potential applications will be discussed, before concluding on extensions to 2D systems.

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