BOUTTARD, Etienne; LABAT, Valérie; BOU MATAR, Olivier; CHONAVEL, Thierry

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BOUTTARD, Etienne
Institut de Recherche de l'Ecole Navale [IRENAV]

LABAT, Valérie
Institut de Recherche de l'Ecole Navale [IRENAV]

BOU MATAR, Olivier
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

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Communication dans un congrès avec actes

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Acoustics 2012 Nantes, Acoustics 2012, 2012-04, Nantes. 2012-04p. 43-47

Société Française d'Acoustique

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In underwater acoustics, detection of buried objects in sediments (cables, mines, . . . ) is a complex problem. Indeed, in order to ensure sufficient penetration depth in marine sediments, low frequencies have to be used, implying a low resolution. A solution proposed to solve this problem is the parametric emission based on the nonlinear properties of seawater. This method can generate a low frequency wave from two directional high frequencies beams. The aim of this work is to present experimental results of a parametric propagation. Experiments have been carried out in a water tank in various configurations. These experimental measurements are then compared with simulation results obtained with a numerical model based on a fractional-step method presented at the Underwater Acoustic Measurements conference in 2011.< Leer menos

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The parametric propagation in underwater acoustics : experimental results

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