Long Range Acoustic Propagation - Modeling and Data Analysis
Abstract
The long-term goals of this research are to understand the physical mechanisms that affect long range ocean acoustic propagation. Those mechanisms that are relevant to the deep-water Navy Anti- Submarine Warfare problem are of particular interest. In addition to understanding acoustic propagation at long ranges, and local effects that can dominate the transmission of sound, we seek an understanding of the relevant oceanographic processes. This work concentrates on two particular physical processes. Firstly, the scattering of sound from the sea-floor in a as it propagates from the shelf (or island) to deep water. Understanding of this process is required for accurate understanding of the details of ocean ambient noise, as well as the prospect of localizing and detecting submarines either up the slope or down the slope from a receiver. The second effect is the scattering of acoustic energy by the sound speed fluctuations induced by internal wave motion of water column. Internal wave scattering effects are seen in a reduction of the coherence lengths in both time and space.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2002
- Accession Number
- ADA627222
Entities
People
- Kevin D. Heaney