Abstract
The work first aims to analyze the parametrized geoacoustic model proposed by Robins [J. Acoust. Soc. Am. 89, 1686–1696 (1991)], in which the density and sound speed distributions vary with respect to depth as a generalized-exponential and an inverse-square function, respectively. The model contains a set of parameters that, by appropriate selection, may fit well the realistic geoacoustic variations [E. L. Hamilton, J. Acoust. Soc. Am. 68, 1313–1340 (1990)]. By choosing the plane-wave reflection field as an objective function, each model parameter is carefully analyzed to determine its range and sensitivity. Then, numerical simulation is employed to establish an inversion procedure, in conjunction with the application of acoustic wave reflection from a nonuniform seabed. Finally, a field experiment is designed and implemented to estimate the seabed acoustic properties based upon the model parameter inversion.
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