Abstract:Aiming at the problem of the influence of typical shallow sea environmental parameters on acoustic propagation loss, this paper proposes an improved coupled simple positive wave-parabolic equation model based on the correction of reflection coefficient of seabed boundary, and designs and carries out a test test of acoustic propagation loss in typical South China Sea waters, with a relative error of less than 4% and a root mean square error of less than 3dB, which verifies the accuracy of the model. Then, five working conditions were designed for four marine environmental parameters, namely sonic velocity profile, sea surface and sea state, seabed bottom and seabed topography, and simulation calculation and analysis were carried out. It is concluded that the sound velocity profile mainly affects the distribution of the acoustic convergence zone, and the energy of the acoustic convergence zone is mostly concentrated near the seabed and the depth of the sound source under the negative gradient, while the energy of the acoustic convergence zone is mostly concentrated near the sea surface under the positive gradient.
