Acoustic Reverberation.
Abstract
This project was the thesis research for Bob Greaves. The thesis consisted of five main sections: i) an analysis of the broadband LFM sweeps from the Acoustic Reverberation SRP 1993 acoustics cruise, ii) a thorough synthesis of all of the geological data sets acquired in and around ARSRP Site A', iii) a study of idealized canonical models of monostatic backscatter from rough and laterally heterogeneous seafloors, iv) a study of the effects of large scale slope and large scale average sub-bottom velocity, v) the modeling results were used to construct a methodology for inferring bottom characteristics from the monostatic backscatter data and the methodology was applied to the 1993 acoustics data. Greaves' thesis showed that the backscattered signals observed in monostatic reverberation experiments are caused by scattering from wavelength-scale seafloor and sub-seafloor variations in the velocity and density. It also showed that scattering intensity is clearly a function of most seafloor characteristics, for example, average sub-seafloor velocity and density, large-scale slope, wavelength-scale rms amplitude and seafloor and sub-seafloor heterogeneity. This study has yielded a greater understanding of the true complexity of the scattered signal that is observed in monostatic reverberation experiments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 24, 1998
- Accession Number
- ADA357041
Entities
People
- Ralph Stephen
Organizations
- Woods Hole Oceanographic Institution