ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
4pUW8. Further results from modeling deep-ocean reverberation from the
Mid-Atlantic ridge.
Stanley A. Chin-Bing
Naval Res. Lab., Stennis Space Center, MS 39529-5004
Joseph E. Murphy
Univ. of New Orleans, New Orleans, LA 70148
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.]