High-Frequency Acoustic Propagation in a Bottom Boundary Layer: The Acoustic Medium Stability Experiment,
Abstract
The Acoustic Medium Stability Experiment used a horizontal array of hydrophones to measure high-frequency acoustic propagation in a coastal shelf environment. Medium properties varied along the acoustic path, which slanted through a vertically inhomogeneous bottom boundary layer. We apply synthetic spatial aperture filtering to isolate the contribution to acoustic scintillation from medium fluctuations localized at a fixed altitude above the bottom. Using Rytov theory, we compare the filtered acoustic data with direct measurements of medium fluctuations obtained at a corresponding altitude. Analyzing several different examples, we find good agreement between acoustic and temperature-conductivity sensor measurements using a simple, anisotropic model for the three-dimensional spectrum of medium fluctuations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1993
- Accession Number
- ADA322719
Entities
People
- G. M. Clements