Abstract
The role of discrete scatterers in marine sediments is evaluated based on acoustic and environmental measurements at the shallow water sediment acoustics experiment, SAX04, and shown to be significant. The sediment at the SAX04 site was complicated and characterized as a stratified medium quartz sand/mud mixture with the presence of a small volume portion of carbonate shells and shell fragments. The sediment particle analysis provided the size and shape distributions for shells, which are used as inputs to a model of incoherent discrete scattering from inclusions in stratified sediments. The model considers inclusions as sparsely distributed, relatively large, randomly oriented particles of irregular shape embedded in a water‐saturated sediment matrix comprised of much smaller (comparing to both wavelength and the size of inclusions) grains. Sound propagation in the sediment matrix is described as in an effective fluid with parameters corresponding to the SAX04 stratified medium sand/mud environment. Usin...
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