Acoustic Propagation in Complex Underwater Environments- Measurements and Models
Abstract
Approved for Public ReleaseThe proposed work seeks to understand and model acoustic propagation in underwaterenvironments, particularly those that contain complexities that are poorly understood or notaddressed by existing models. The specific objectives addressed in this proposal are focused onthe acoustics of marine sediments and sea ice and their influence on acoustic propagation. Formarine sediments, the proposed work seeks to answer questions about the depth-dependentstructure of the geoacoustic properties of the seabed, including near surface gradients in soundspeed related to bioturbation. The measurements will support experiments planned by ONROcean Acoustics (OA) and Task Force Ocean (TFO). In relation to sea ice, the proposed workseeks to determine acoustic sensitivity to the seasonal changes in the physical properties of seaice (i.e., compressional and shear wave speed and attenuation), using measurements of acousticsignals on the Chukchi Shelf. Additionally, this proposal seeks to develop statistical and/orpredictive models forambient sound under a range of ice conditions, including the marginal icezone, ice growth period, maximum ice cover period, melt season, and open water.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 06, 2021
- Source ID
- N000142112245
Entities
People
- Megan S. Ballard
Organizations
- Office of Naval Research
- United States Navy
- University of Texas at Austin