Simulation and Application of Acoustic Transmission in Shallow Sea Based on Ray Method

Aiming at the acoustic transmission with 3 km in the shallow sea, an integrative simulation model is built based on the conceptions of the stepping sound ray tracing method and sound abnormity factor. The effects of the propagation path and the sound ray bend due to transmitter and receiver positions and hydrological condition on the sound-field strength are considered in the model. With this model, a principle of identifying sound ray step and density is proposed,the equations of sound abnormity factor and sound transmission loss are modified, and the relation between sound ray density and sound-field strength is presented. Two sets of sea trial data collected by corresponding acoustic equipments show that the effects of sound ray bend and propagation path on sound-field strength can not be ignored in the shallow sea acoustic simulation. This model is effective in simulating practical acoustic characteristics, and the results can satisfy the simulation requirements.