Further results from modeling deep-ocean reverberation from the Mid-Atlantic ridge

Abstract

Results comparing computer model simulations and reverberation data [Chin-Bing and Murphy, 3328(A) (1994)] have been reported previously. The reverberation data were taken from the Mid-Atlantic ridge region during the 1993 Acoustics Experiment as part of the ONR Acoustic Reverberation Special Research Program (ARSRP). A representation of the rough, range-dependent ocean sediment and sub-bottom bathymetry of the region was obtained from geomorphological models (the Webb–Jordan sediment distribution model and the Goff–Jordan fractal seafloor/basement model). A modified version of the Collins fepe2way model was used for the long-range reverberation predictions. Our model simulations compared favorably with 210- to 290-Hz bandwidth reverberation data gathered from ‘‘site A, seg 076.’’ In this continuing study of site A, seg 076, the fframe and safe models are being used to study the influence of heavily sedimented regions on reverberation. New modeling results will be presented and compared with the measured reverberation. [Work supported by Office of Naval Research, Acoustic Reverberation SRP, and a High Performance Computing DoD Shared Resource Center grant.]