A fast inversion method of marine environment parameters based on bottom reflection phase shift

Abstract

The marine environment parameters can be estimated by analyzing the received sound signal. In shallow water waveguide with high-speed bottom, the transmission loss of sound signal can be obtained by the bottom reflection phase shift, which consists of the bottom parameters. A fast inversion method of the marine environment parameters based on bottom reflection phase shift is presented in this paper. Bayesian inversion theory is the theoretical framework for the application of this method. The signal obtained from the measured data is the input function, and the replica can be calculated by the bottom reflection shift parameter and other parameters in water column quickly. The propagation range and depth, and some geoacoustic parameters were estimated accurately by the posterior probability density without the prior knowledge of the marine environment information. This method can be applied to most shallow water waveguides, and is also applicable to acoustic signals with different bandwidths. The accuracy and validity of the inversion results are verified by the experimental data.