Shallow Water Sound Propagation in the Arctic Ocean

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

Low-frequency broadband sound source localization using an adaptive normal mode back-propagation approach in a shallow-water ocean.

A variety of localization methods with normal mode theory have been established for localizing low frequency (below a few hundred Hz), broadband signals in a shallow water environment. Gauss-Markov inverse theory is employed in this paper to derive an adaptive normal mode back-propagation approach. Joining with the maximum a posteriori mode filter, this approach is capable of separating signals...

Sound Propagation Through the Stochastic Ocean.

The ocean is opaque to electromagnetic radiation and transparent to low-frequency sound. So acoustical methodologies are an important tool for sensing the undersea world. Stochastic sound-speed fluctuations in the ocean, such as those caused by internal waves, result in a progressive randomization of acoustic signals as they traverse the ocean environment. This signal randomization imposes a li...