Analysis of the influence of vertical sound field distribution on acoustic testing in shallow sea environment

Abstract

The vertical sound field distribution in shallow seas is similar to the standing wave field, and the single-frequency sound source will have antinodes and nodes in the vertical direction. Therefore, the acoustic test system will have a greater impact on the test results when the acoustic test system is placed at different depths. In this paper, the fast field method is used to solve the spatial sound field distribution of the single-frequency line spectrum and the one-third octave broadband spectrum. The calculation results of the sound source fixed depth receiving point at a certain depth are given, and the different sound velocity gradients and acoustics are analyzed. The impact of the test system receiving depth changes on the sound field strength has certain engineering guiding significance for the actual underwater acoustic test.