Intensity evaluation of bottom backscattering between high-frequency underwater acoustic instruments and its experimental validation

Running several high-frequency underwater acoustic instruments simultaneously on board a surface or underwater platform can cause interference between the instruments. By combining ray theory and the high-frequency bistatic scattering model for water bottoms, this work presents a practical method for evaluating the relative intensities of such interference signals corresponding to different instrument-to-instrument distances. To examine this method's effectiveness, a series of lake experiments were conducted. The relative intensity of the interference signal was first evaluated by using the proposed method, and then it was measured for comparison. The experimental results showed good agreement between the evaluated and the measured intensities.