Ray Transmissions in an Underwater Acoustic Duct with a Pseudorandom Bottom

摘要: The principles of geometrical optics are applied to a study ray acoustics in an isovelocity sound channel bounded by lossy, pseudorandom (facet) bottom below and free, planar surface above. A point source receiving fixed plane normal the so that all rays between them coplanar. At each reflection, is assumed locally linear with sufficient length almost reflected radiation takes specular direction. have small random slope about zero mean depth deviation constant value. Effects boundary loss phase shift, spreading loss, travel time included; bottom‐reflected arrivals shown be amplitude but incoherent phase. Multipath interference treated random‐walk theory. Graphs presented giving standard deviations sound‐field intensity for various geometries.