High Frequency Acoustic Channel Characterization for Propagation and Ambient Noise
Abstract
The long term goals of this project are to research the physics of high frequency (1-50 kHz) acoustic propagation and ambient noise in the ocean. This work is relevant to many types of Navy sonars such as active ASW and MCM systems and underwater acoustic modems for communications. Improved understanding is leading to better ways to adapt to and exploit the environment for enhanced sonar system performance. One of the main objectives of this research is to develop techniques that use ocean ambient noise field to characterize seabed properties. Better knowledge of the seabed will improve the capabilities of sonar performance prediction tools and are the basis for improving sonar performance through environmental adaptation of the systems. Many factors can contribute to variability observed in sonar performance but the seabed type often has the strongest impact on propagation (especially in shallow water) and is one of the quantities that can be measured and archived for future use. In this work, an ambient noise based geoacoustic inversion methodology has been developed and this was applied to a data set that also had transmissions from a towed sound projector. These tow transmissions were used to help validate the quality of the ambient noise inversion results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2007
- Accession Number
- ADA569084
Entities
People
- Martin Siderius