Seismo-acoustic ray model benchmarking against experimental tank data

O.C. Rodriguez1,2,
J. M. Collis
H. J. Simpson
E. Ey1,
J. Schneiderwind 1,
P. Felisberto1,2,
E. Ey1,
1LARSyS, IST, Lisbon
2University of Algarve
Campus de Gambelas, PT-8005-139 Faro, Portugal

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Ref.: Journal of the Acoustical Society of America, 132, No.2, pp.709-717, August 2012.

Acoustic predictions of the recently developed TRACEO ray model, which accounts for bottom shear properties, are benchmarked against tank experimental data from the EPEE-1 and EPEE-2 experiments. Both experiments are representative of signal propagation in a Pekeris-like shallow-water waveguide over a non-flat isotropic elastic bottom, where significant interaction of the signal with the bottom can be expected. The benchmarks show, in particular, that the ray model can be as accurate as a parabolic approximation model benchmarked in similar conditions. The results of benchmarking are important, on one side, as a preliminary experimental validation of the model and, on the other side, demonstrates the reliability of the ray approach for seismo-acoustic applications.