Low Frequency Acoustic Propagation: The Effects of Sediment Properties
Abstract
This research grant supports understanding the frequency and depth dependence of compressional wave attenuation and developing new inversion schemes for shear wave properties. Previous investigations indicated that water-borne acoustic arrival properties, such as the Airy Phase, are sensitive to sediment shear properties. This work will develop and test inversion schemes for the estimation of compressional and shear properties. As part of this grant URI will deploy their low (5-50 Hz) and high frequency (50-500 Hz) shear wave measurement systems to validate their inversion schemes and produce shear speed profile estimates to support investigations of the effects of shear on compressional wave attenuation. An existing URI Shear Measurement System and the a new iWASP system will be used for interface/Scholte wave inversions to obtain shear properties using Low frequency broadband acoustics signals for both short and long range measurements. Novel techniques for measuring interface waves using mobile platforms such as Remotely Operated Vehicles will be developed.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 08, 2016
- Source ID
- N000141612331
Entities
People
- James M. L. Miller
Organizations
- Office of Naval Research
- United States Navy
- University of Rhode Island