Research Summaries

Back Understanding, modeling, and exploiting underwater sound to characterize the water column and seabed

Fiscal Year 2020
Division Graduate School of Engineering & Applied Science
Department Physics
Investigator(s) Godin, Oleg A.
Sponsor Office of Naval Research (Navy)
Summary This project aims to advance physical understanding and mathematical modeling of noise generation mechanisms in order to explain and exploit the observed spectra, directivity, depth dependence, intermittency, and correlation properties of low- and mid-frequency ambient sound in the ocean. Using the data acquired in the Shallow Water 2006 experiment off the coast of New Jersey and in the 2012 Florida Straits Noise Interferometry experiment, we will investigate performance of a new, low-cost and surreptitious passive approach to remote sensing of the ocean interior, which takes advantage of long-range correlations in the ambient underwater sound. We will investigate the hypothesis that, for the purposes of sonar performance predictions, high-resolution environmental measurements and full-physics ocean models can be replaced with simplified ┬┐effective┬┐ models of the acoustic propagation environment, and that the effective models can be efficiently constructed and updated by assimilation of sparse acoustic and environmental measurements, including spectra and cross-correlation functions of ambient sound.
Keywords
Publications Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal