Mesoscopic wave physics in fish shoals

Autor: Benoit Tallon, Philippe Roux, Guillaume Matte, Jean Guillard, Sergey E. Skipetrov

Publikováno v: AIP Advances, Vol 10, Iss 5, Pp 055208-055208-5 (2020)

Ultrasound scattered by a dense shoal of fish undergoes mesoscopic interference, as is typical of low-temperature electrical transport in metals or light scattering in colloidal suspensions. Through large-scale measurements in open sea, we show a set

Externí odkaz: https://doaj.org/article/765278b3950a45e691ca9d479ea0b2fb

Anisotropy of localized states in an anisotropic disordered medium

Autor: Antton Goïcoechea, John H. Page, Sergey E. Skipetrov

Publikováno v: Annals of Physics
Annals of Physics, Elsevier Masson, 2021, pp.168565. ⟨10.1016/j.aop.2021.168565⟩

We study Anderson localization of a scalar wave in an ensemble of resonant point scatterers embedded in an anisotropic background medium. For uniaxial anisotropy of moderate strength, the mobility edges and the critical exponent of the localization t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de173391c0c0bfde9c0f1d5cfe638e96
https://hal.archives-ouvertes.fr/hal-03363257

Ultra slow acoustic energy transport in dense fish aggregates

Autor: Jean Guillard, John H. Page, Sergey E. Skipetrov, Philippe Roux, Benoit Tallon, Guillaume Matte

Publikováno v: Scientific Reports
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Scientific Reports, Nature Publishing Group, 2021, 11 (1), pp.17541. ⟨10.1038/s41598-021-97062-4⟩
Scientific Reports, 2021, 11 (1), pp.17541. ⟨10.1038/s41598-021-97062-4⟩

A dramatic slowing down of acoustic wave transport in dense fish shoals is observed in open-sea fish cages. By employing a multi-beam ultrasonic antenna, we observe the coherent backscattering (CBS) phenomenon. We extract key parameters of wave trans

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ef953547ea5ca1329220a56c3893fc2
https://pubmed.ncbi.nlm.nih.gov/34475477

Acoustic density estimation of dense fish shoals

Autor: Guillaume Matte, Jean Guillard, Sergey E. Skipetrov, Benoit Tallon, Philippe Roux

Publikováno v: Journal of the Acoustical Society of America
Journal of the Acoustical Society of America, Acoustical Society of America, 2020, 148 (3), pp.EL234-EL239. ⟨10.1121/10.0001935⟩
Journal of the Acoustical Society of America, 2020, 148 (3), pp.EL234-EL239. ⟨10.1121/10.0001935⟩

Multiple scattering of acoustic waves offers a noninvasive method for density estimation of a dense shoal of fish where traditional techniques such as echo-counting or echo-integration fail. Through acoustic experiments with a multi-beam sonar system

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f25496d4d4f4c0813aa8e96dfec81f0e
https://pubmed.ncbi.nlm.nih.gov/33003841

Suppression of transport anisotropy at the Anderson localization transition in three-dimensional anisotropic media

Autor: Antton Goïcoechea, John H. Page, Sergey E. Skipetrov

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2020, 102 (22), pp.220201. ⟨10.1103/PhysRevB.102.220201⟩

We study the transport of classical waves through three-dimensional (3D) anisotropic media close to the Anderson localization transition. Time-, frequency-, and position-resolved ultrasonic measurements are performed on anisotropic slab-shaped mesogl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce8c0117ad76659e48ed0ed226318d94
https://hal.archives-ouvertes.fr/hal-03102297