The Analysis of Reverberation Affected by Tide Changes in Shallow Water

Cognitive sonar automatically perceives dynamic marine environment, thus optimizes the working parameters and performance. So it is necessary to monitor of the tidal level by sonar itself in shallow water. In this paper, based on the three-dimensional acoustic field calculation theory, the equation reflecting the relation among reverberation intensity and sea depth is deduced, and the reverberation variation caused by periodical tidal changes is discussed by experiments and simulation. The experiment shows that the change law of the reverberation intensity has the positive correlation with sea depth in the trial sea. This conclusion provides a reference for the study of cognitive sonar dynamic marine environment perception.