Executive Summary
This thesis examines the influence of shallow water variability on short-range acoustic propagation, focusing on internal wave fluctuations and random sound speed perturbations. It quantifies the effects of littoral variability on sonar systems using spatial coherence functions, with data numerically generated from an acoustic propagation model based on East China Sea environmental data. The study aims to enhance forecasting capabilities for active and passive sonar in littoral regions.
Why It Matters
This document is crucial for defense analysts as it directly addresses the challenges of acoustic propagation in shallow littoral waters, which are increasingly important operational environments for naval forces. Understanding these environmental effects is vital for improving sonar performance and anti-submarine warfare capabilities.
Key Takeaways
- Shallow water variability, including internal waves and sound speed perturbations, significantly impacts short-range acoustic propagation and sonar performance.
- The study uses numerical modeling based on East China Sea data to quantify these effects, particularly on vertical coherence functions.
- Improved understanding of littoral acoustic environments is essential for enhancing forecasting capabilities of active and passive sonar systems.
- The MMPE model is adapted to incorporate various sound speed fluctuations in the water column.
Strategic Relevance
Understanding and mitigating the effects of shallow water variability on acoustic propagation is strategically important for naval operations in littoral zones. It directly impacts the effectiveness of sonar systems for detection, classification, and targeting, thereby influencing anti-submarine warfare, mine countermeasures, and overall maritime domain awareness in contested coastal areas.