Acoustic Scattering from Biologically Active Fine-Grained Sediments
Abstract
" The objective of the proposed work is to better understand the scattering response from both individual and groups of idealized and real burrows in fine-grained sediment using finite element modeling. Next, bioturbation temporal models will be coupled with acoustic scattering models, resulting in a predicted temporal acoustic scattering response from the seafloor given a burrowinginfaunal community and productivity. Results may also be compared to a project measuring the temporal changes in seafloor scatter as they relate to seasonal changes in animal abundance or after and an episodic disturbance of the seafloor (Measuring and modeling temporal changes in the seafloor scatter and its relationship with environmental variability, ONR Grant No. N00014-19-1-2732, Principal Investigator A.P. Lyons). In addition to increasing our a basic understanding of the impact of biological organisms on seafloor acoustic properties and insights into causes of temporal variability of scattering fromshallow-water seafloor sediments, any resulting advances in modeling would be useful for understanding impacts on sonar systems used for detection and classification or for developing new methods which may adapt to or exploit knowledge of the mechanisms influencing or causing changes in the acoustic environment. Models for biological influence or for mechanisms inducingchanges in controlling geo-acoustic parameters, such as roughness, sound speed, or porosity based on biological models, may also be developed and could improve the estimation of the performance of Navy sonar systems."
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012458
Entities
People
- Anthony P. Lyons
Organizations
- Office of Naval Research
- United States Navy
- University System of New Hampshire