In-situ geoacoustic properties of mud: Temporal and spatial dependencies
Abstract
The geoacoustic properties of mud affect the spatial and spectral characteristics of acoustic propagation, reverberation and noise on continental shelf, slope and deep-water environments. Roughly 30% of continental shelves and the vast majority of continental slope and deep-ocean seafloors are blanketed with mud. In shallow water, mud thickness may be sub-meter to tens of meters. In the deepocean mud thickness is commonly hundreds to thousands of meters thick. In this study the focus is on shallow-water mud. Here, the mud properties influence not only the spatial and spectral characteristics of propagation, reverberation and noise, but may also affect their temporal characteristics. The hypothesis is that temporal changes in oceanography (temperature and salinity of the near bottom water) may induce temporal changes in the mud properties as a function of depth in the sediment. The goal of this project is to advance scientific understanding of how the geoacoustic properties of mud vary in the vertical and horizontal dimensions over time. Approved for Public Release
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 12, 2023
- Source ID
- N000142312337
Entities
People
- Charles W. Holland
Organizations
- Office of Naval Research
- Portland State University
- United States Navy