Abstract: We consider the propagation into shallow water of low-frequency and low-order acoustic modes trapped in the sound channel. The phase velocity slightly decreases and then increases with decreasing depth. This leads to an ...

Abstract: Internal waves scatter sound by two related perturbations: 1) those associated with vertical particle displacements ?(x, y, z, t) in the presence of a vertical gradient of (potential) sound speed (δc = ??zcp); and 2) those ...

Abstract: Explosions of 300 lbs of TNT at 1 km depth off Perth, Australia were recorded on Bermuda hydrophones, demonstrating 30 years age the feasibility of global acoustic transmissions. Climate-induced changes in ocean temperature ...

Abstract: Detonations at the depth of the sound channel axis off Perth, Australia were recorded on Bermuda hydrophones at a 178°.2 range (180° is antipodal). The analysis by Shockley et al. of this 1960 transmission experiment allows ...

Abstract: rapid and broadband (1 h, 1 < f < 400 Hz) increase in pressure and vertical velocity on the deep ocean floor was observed on seven instruments comprising a 20-km array in the northeastern subtropical Pacific. The authors ...

Abstract: A field test of ocean acoustic tomography was conducted in 1981 for a two month period in a 300 km square at 26°N, 70°W in the North Atlantic (just south of the MODE region). Nine acoustic deep-sea moorings with sea floor ...