Abstract
The propagation of acoustic energy in a range dependent environment will be analyzed. The broadband acoustic signals from explosive sources collected during the Shelf Break PRIMER Experiment will be used for this study. Time–frequency behavior of these signals will be analyzed using wavelets. Upslope propagation along varying bathymetry (from 800 m at source location to 90 m at the receiver) and sound speed is considered. A simple model for the sediment compressional speeds will be extracted using a hybrid inversion scheme. This hybrid scheme uses a genetic algorithm and Levenberg–Marquardt nonlinear least-squares method. Inversion is based on group speed dispersion. Theoretical group speeds will be calculated based on range-dependent propagation. [Work supported by ONR.]
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