During the Sediment Acoustic eXperiment (SAX04), sediment physical properties (e.g., porosity and permeability), determined by the arrangement of sand grains and the topology of the pore space, were evaluated in two ways: first, packing density in unconsolidated sand was adjusted from minimum to maximum density by vibration; and second, diver-collected cores were impregnated with polyester casting resin to maintain pore and grain morphologies. Sediment pore-morphology and grain data was captured ...