Acoustics of Underwater Sediments
Abstract
The long-term goal of this research is to understand environmental effects on acoustic propagation to and scattering from a known object buried in the ocean bottom. Enhanced acoustic transmission into sandy ocean sediments has been observed when a sound field incident on the bottom impinges at grazing angles below critical but the mechanism for the enhancement is not clear. Of particular interest here is a mechanism suggested by researchers from the Applied Physics Laboratory at the University of Washington (APL/UW), who propose small-scale surface roughness can enhance acoustic penetration by diffracting energy down according to the spatial wavelengths exhibited by the roughness. The goal of this work is to isolate and quantify the role of ocean bottom roughness on the transmission process and understand its implications to modifying the acoustic response of an object buried at extended ranges from an acoustic source.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1998
- Accession Number
- ADA537349
Entities
People
- Joseph L. Lopes
- Raymond J Lim