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The parametric propagation in underwater acoustics : experimental results
Langue
en
Communication dans un congrès avec actes
Ce document a été publié dans
Acoustics 2012, 2012-04-23, Nantes. 2012-04-23p. paper 000735, 43-47
Résumé en anglais
In underwater acoustics, detection of buried objects in sediments (cables, mines, . . . ) is a complex problem. Indeed, in order to ensure su cient penetration depth in marine sediments, low frequencies have to be used, ...Lire la suite >
In underwater acoustics, detection of buried objects in sediments (cables, mines, . . . ) is a complex problem. Indeed, in order to ensure su cient 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.< Réduire
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