Horizontal Range versus Depth Solution of Sound Source Position under General Sound Velocity Conditions Using the Lloyd's Mirror Interference Pattern

摘要

An algorithm is developed which enables the computation of horizontal range and/or depth from a submerged sound source, using ray acoustics and the Lloyd's mirror interference effect. The solution is based on Snell's law and involves integrating multipath sound rays to find the difference in length between the direct and surface reflected sound paths from the source to the receiver. This difference in path length is directly related to the observed Lloyd's mirror interference pattern. No assumptions as to the mathematical characteristics of the sound velocity profile (SVP) are made nor are far field approximations used. The solution is as accurate as the SVP data input to the problem. A general computer flow chart and basic language program are provided to allow local commands the capability of premission planning based on specific operating area environmental information.