THE COMPARISON BETWEEN WAVE NUMBER INTEGRATION AND PARABOLIC EQUATION AND THEIR APPLICATIONS IN TONKIN GULF

Abstract

The Wavenumber Integration method (often called Fast Field Program -
FFP) and the Parabolic Equation (PE) are two popular methods in the study of
underwater sound transmission today. In this paper, the author studied the
two methods FFP and PE mathematically and applied them to simulate sound
transmission in Tonkin Gulf. The simulation results show that FFP is a depth-
dependent method, while PE is a range-dependent method and has larger
computational losses than PE. In addition, it also strengthens the theory of
increased loss due to absorption when increasing frequency during
underwater sound transmission and shows that FFP has a loss that depends
more on the source frequency than PE.