The velocity and attenuation of compressional([Formula: see text], [Formula: see text] respectively) and shear waves ([Formula: see text], [Formula: see text], respectively), determined with the Pulse Transmission technique at a frequency of about 100 kHz, are compared with the grain size, shape, porosity, density, and static frame compressibility of dry and water‐saturated sands. Except for [Formula: see text], all the quantities [Formula: see text], [Formula: see text] and [Formula: see text] are dependent on grain size and are higher in coarser grains than in finer grains. [Formula: see text] decreases significantly with increasing differential pressure in coarse‐grained sediments, but the same sediments show an anomalous increase with differential pressure in [Formula: see text] at low pressures. We have also modeled the [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] of these samples to understand the mechanisms governing the observed changes. The Contact Radius model with surface force effects predicts both [Formula: see text] and [Formula: see text] to be dependent on grain size. Frictional losses in unconsolidated coarse‐grained sands must also be considered at small strains [Formula: see text]. Velocity and losses measured in saturated sands are higher than those predicted by the Biot model, which does not account for any grain size dependence of the seismic qualities.
Modelling the spectral induced polarization response of water-saturated sands in the intermediate frequency range (102–105 Hz) using mechanistic and empirical approaches
