Office of Naval Research Graduate Traineeship Award in Ocean Acoustics for Ankita Deepak Jain
Abstract
The long-term goal of this research is to develop a unified theory and model for ocean reverberation dependent on seafloor parameters such as density, compressibility and coherence volume. We aim at using the model to invert for these parameters and obtain accurate estimates by calibrating modeled returns with data collected during past Ocean Acoustic Waveguide Remote Sensing (OAWRS) experiments. We also aim at developing a method for probing the ocean and ocean sediment at larger depth for imaging submerged objects at high resolution. We aim to use nonlinear scattering of sound in the presence of inhomogeneities to obtain high resolution images at high penetration depth. Through the developed theory, we can tackle the problem of high attenuation of acoustic field at high frequencies in ocean sediment, and the low resolution of low frequencies on the other hand. Another goal of this research is to model biological clutter and attenuation in the continental shelf environments of the ocean. Acoustic clutter is the primary problem encountered by active sonar systems operating in these environments, and clutter characterization will help distinguish biological clutter from seafloor reverberation and intended targets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542038
Entities
People
- Nicholas C. Makris
Organizations
- Massachusetts Institute of Technology