Theoretical Computations of Sound Reflection from a Layered Ocean Bottom
Abstract
A computer model has been developed to permit systematic theoretical investigations to aid in the interpretation and prediction of ocean bottom reflectivity. In addition, such a model can be value in planning acoustic measurement programs. The layered ocean bottom model can be used to explain the effect of frequency, layering, and sediment properties on bottom reflection loss as a function of grazing angle. Theoretical computations can be used for interpreting acoustic data for the purpose of defining the acoustic properties of bottom sediments; however, extreme care must be exercised when so doing, as it is apparent that various combinations of sound velocity, density, absorption, and layer thickness can produce the same reflectivity curve. Limited comparisons of computed and measured reflectivity in abyssal plain regions have shown that experimental data are consistent with a model that considers the ocean bottom to be flat, absorbing, layered, and fluid. The usefulness of the model for predicting bottom reflectivity is limited by our knowledge of the exact properties of the ocean bottom.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- ADA035013
Entities
People
- Robert S. Winokur
Organizations
- Naval Oceanographic Office