Abstract
Sound speed and bulk density profiles measured from SAX04 sediment cores are used to estimate correlation lengths of fluctuations in the sound speed and the bulk density. Sound speed is measured from 5.9-cm-diameter cores at 1-cm intervals and bulk density is measured at 2-cm intervals from the same cores. Previous estimates of these parameters from experimental data involved fewer realizations (cores), limited sampling areas, and samples without mud flasers within the sand sediment. Values of correlation length may vary according to location within the SAX04 site. Correlation length values estimated with Burg’s algorithm from sediment sound-speed fluctuations averaged 2.24 cm, from sediment bulk density fluctuations averaged 2.53 cm. Ranges of values of correlation length estimated from bulk density fluctuations from locations inside the experiment site are used to present a range of volume scattering strength predictions, given the other parameters of sediment sound speed, sound attenuation, density ratio variance, and ratio of sound speed to density fluctuations used by the perturbation approximation to the composite roughness model for each location. At the SAX04 site, interface scattering dominated over volume scattering, despite the presence of mud inclusions with strong sound speed and bulk density contrasts. [Work sponsored by ONR.]
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call