Reverberation from rough ocean boundaries often degrades the performance of active
sonar systems in the ocean. The focusing capability of the time-reversal method provides a …

This paper presents preliminary results of a recent study whose overall objectives are to
determine the mechanisms contributing significantly to subcritical acoustic penetration into …

Backscattering from the rough water-bottom interface can serve as a surrogate probe source
in time reversal. A time-gated portion of the reverberation then is refocused to the bottom …

Time reversal mirrors have been applied to focus energy at probe source locations and point
scatterers in inhomogeneous media. In this paper, we investigate the application of a time …

For a low-frequency sound signal propagating in a two-dimensionally inhomogeneous
shallow-water waveguide, the influence of random bathymetry (fluctuating bottom boundary) …

A shallow-water reverberation model is developed based on Bass perturbation theory. The
key component for shallow-water reverberation modeling, the modal backscattering matrix …

A new wave theory model providing consistent modeling of seabed insonification, three-
dimensional target scattering, and rough seabed reverberation has been used to investigate …

Compact analytic expressions are derived for the mean, mutual intensity, and spatial
covariance of the acoustic field forward propagated though a stratified ocean waveguide …

The mean and variance of the acoustic field forward propagated through a stratified ocean
waveguide containing three-dimensional (3-D) random internal waves is modeled using an …

The modal shallow water reverberation theory and the energy-flux shallow water
reverberation theory were combined to get a new energy-flux model of waveguide …