Simulation of Underwater Sound Propagation of High-Speed Sources

A signal segmentation method is proposed to simulate underwater sound propagation of high-speed sources. The effects of range and depth change of the source position on the sound propagation are analyzed. The simulated noise of a high-speed source travelling through the underwater channel are calculated for several typical sound velocity profiles of shallow and deep sea. We only care about the conditions that the distance between the source and receiver is not larger than 10 km. And for deep sea, we only care about when the source and receiver are both within shallow area. The calculations show that the influence of the depth change of a moving source on the power spectrum of the received signal is dependent on the rate of change of the sound velocity to depth. It is also shown that when there are only several eigen rays with different phase angles for the underwater acoustic channel, the summation of these eigen rays may cause interference patterns, and periodicity can be seen in the power spectrum of the received signals.