Understanding the Acoustic Near-field of the Kauai Beacon: Bathymetry, Seabed, and 3-D Effects
Abstract
Previous studies have demonstrated the significant influence of near-field interactions between acoustic signals and the seafloor on long-range sound propagation. This study aims to expand upon these findings by examining the impact of local bathymetry and seabedproperties on signals generated by the Kauai Beacon and received at the ALOHA Cabled Observatory, the deep portion of the Pacific Missile Test Range and ship or AUV deployed hydrophones in the area. Two and three-dimensional ray and parabolic equation models willbe used to calculate along range and cross-range scattering of the signal. By considering the near-field effects in response to bathymetry and seabed in three dimensions, this work will contribute to understanding factors at play in long-range propagation, ultimately assisting in improving long-range acoustic applications, e. g., navigation and tomography. Additionally, this work will begin apublicly accessible long-term data time series of the signal to understand the ocean fluctuations, building upon the earlier HawaiiOcean Mixing Experiment.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 08, 2024
- Source ID
- N000142412546
Entities
People
- Eva-Marie Nosal
Organizations
- Office of Naval Research
- United States Navy
- University of Hawaiʻi System