Geoacoustic modeling of the seabed at higher frequencies

Abstract

In propagation at higher frequencies, local fluid motion in "hidden coordinate" systems and local discontinuities due to gas bubbles and bioturbation have a perturbing effect on the wave field. To model these effects, a baseline model that reflects the influence of basic primitive variables such as porosity and mean effective stress is first derived on the basis of the Biot theory and then effects of various discontinuities are introduced as perturbations to the baseline model.