Analysis of interference characteristics of different sound source depths under typical shallow water sound field

The waveguide invariants are stable in shallow water when receiver is far away from source, and they are related to the ocean environment parameters. In this paper, through theoretical research and simulation analysis, it is found that the change of sound source depth will affect the simulating results of waveguide invariants, when using single-element receiving hydrophone and broadband frequencies sound source, and the distance of source and receiver is close. At the same time, it is found that at a long distance, the waveguide invariants are correlated with the sound source depth under the condition of shallow sea negative thermocline waveguide.