Theoretical Studies of Sound Propagation in Shallow Water

Numerical Studies of Acoustic Propagation in Shallow Water

We have focused our attention on the development and use of the finite-difference time-domain (FDTD) method. This time-domain technique, which is flexible, robust, and simple to implement, has previously been used by the electromagnetics community to solve a wide range of problems. However, the FDTD method has not been widely used by the acoustics community and its ability to accurately solve m...

12: Shallow Water Propagation

Shallow-Water Propagation

(A) For elastic sediments we derived a new PE formulation [1] that unlike any predecessor handles layered environments accurately and efficiently while remaining numerically stable. This formulation, based on different computational variables, can treat range dependent sediments and properly account for energy conservation [2]. We demonstrated additional properties and advantages of the new met...

10: Shallow Water Propagation

The Impact of Oceanographic Variability of Sound Propagation in Shallow Water Using Polynomial Chaos Expansions

The acoustic response to propagation through oceanographic uncertainty has been derived using polynomial chaos expansions to the coupled mode equations for propagation in range dependent environments. In this approach the sound speed variability is decomposed into vertical EOF mode shapes for uncorrelated components of the sound speed defect. Horizontally each of these EOFs is assumed to be cha...