Multiple scattering of ultrasonic waves in complex media: applications in fisheries acoustics

Abstract : Wave transport in complex media is widely studied through calibrated model systems ranging from nano-powder (in optics) to millimetric beads aggregates (in acoustics). Those samples are designed to strongly scatter waves and achieve complex transport phenomena such as wave sub-diffusion. In this seminar, I will show how model systems achieved by millifluidics are good candidates to study such phenomena with ultrasounds. Then, we will see how similar observations can be done in a natural disordered system namely: a shoal of fish. The parallel between laboratory and in situ experiments gives i) new characterization tools for fisheries acoustics and ii) leads for the bio-inspired design of disordered systems.

Le 13 février 2024 à 11h00 / Amphithéâtre François Canac, LMA

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