A robust passive interferometry technique for sediment geoacoustic characterization

摘要: Due to the dispersive characteristics of acoustic propagation in shallow water, broad-band sound field excited by a passing ship usually exhibits an interference structure with form striations space-frequency plane. Waveguide invariant theory is derived interpret striation slope and has been used for underwater inverse problems including sediment geoacoustic characterization, source localization, target recognition others. Owing processing methods previously used, most applications only use overall as observable, however, local that also closely related environmental properties was not considered. In this paper, passive interferometry technique proposed characterization using features extracted multi-scale line filter. Based on Yellow Shark model, synthetic study method presented characterization. The robustness depth range uncertainties are studied analysis numerical simulation. Finally, data due ships collected Mediterranean Sea 2007 processed test feasibility method.