Directional Wave Spectrum Evolution Modelling of Underwater Sound Fields: Theory and Applications
Abstract
PROJECT SUMMARY/ABSTRACTApproved for Public Release M. Brown, Directional wave spectrum evolution modelling of underwater sound fields: Theory and applicationsThe proposed work focuses on developing and applying a new propagation model that predicts the evolutionin space and time of the directional spectrum of an underwater sound field. As special cases, the new propagation model can predict familiar wavefield descriptors, including the broadband mean-square pressure as a function of range and depth for a continuous wave source, and the mean-square pressure as a function of depth and time on a long vertical array at a fixed propagation range for a pulse-like source. Unlike traditional PE and normal mode propagation models, the new model predicts, as an intermediate step, the directional spectrum of the underwater sound field. The directional distribution of energy provides important additional information about the underlying propagation physics. Directional information can be used, for example, to infer seafloor structure (via critical angle dependence) or to extrapolate a wavefield forward or backward in range. Applications of the new model that will be investigated as part of the proposed work include modelling of ship noise and modelling of wind-generated noise.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 08, 2024
- Source ID
- N000142412517
Entities
People
- Michael C Brown
Organizations
- Office of Naval Research
- United States Navy
- University of Miami