High Frequency Acoustic Reflection and Transmission in Ocean Sediments
Abstract
Development of a physical model of high-frequency acoustic interaction with the ocean floor, including penetration through and reflection from smooth and rough water/sediment interfaces, scattering from the interface roughness and volume heterogeneities and propagation within the sediment. The model will aid in the detection and classification of buried mines and improve SONAR performance in shallow water. OBJECTIVES 1) New finite element modeling capability for acoustic sediment interactions. 2) A comparative study of acoustic sediment interaction models including visco-elastic, Biot, BICSQS, and grain shearing and scattering models including perturbation theory, small slope approximation and finite element models through careful comparison with experimental measurements of the bistatic return, for the purpose of defining the best physical model of highfrequency acoustic interaction with the ocean floor. 3) An inversion methodology that can provide input parameters for the resulting physical model from reflection coefficient measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542075
Entities
People
- Marcia J. Isakson
Organizations
- University of Texas at Austin