Comprehensive Data Analysis and Modeling of Mid and Low Frequency Sonar in Coastal and Basin-Scale Environments
Abstract
This report covers research completed between 15 March 2018 and 30 September 2021, funded by the ONR grant entitled: "Comprehensive Data Analysis and Modeling of Mid and Low Frequency Sonar in Coastal and Basin-Scale Environments." The primary objective of this ONR grant was to improve understanding of acoustic propagation on two scales, O(10 km) littoral scale and O(1000 km) basin scale. To accomplish this goal, two tasks were undertaken simultaneously: curating a set of data from ocean experiments, and developing a model-framework capable of modeling 3D aspects of the ocean acoustic propagation. This co-development facilitated model/data comparisons and investigations into the effect of oceanography and bathymetry on sound intensity, and the factors driving noise, reverberation and errors in source localization. Three studies are included in this report, and considered generally representative of the technical output of this grant. Two of these study ship-noise; one using the vector field generated by a single ship to inverting for geo-acoustic properties, and the other investigating the ship-traffic noise levels driven by seasonal oceanography (and the economic downturn relating to COVID19). The third study analyzes broadband pulse propagation, the refraction effects driven by bathymetry, and the implications for source localization. All three studies have benefit from the development of model-framework, which facilitated geo-acoustic inversions and noise prediction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 19, 2022
- Accession Number
- AD1156852
Entities
People
- David R. Dall'osto
Organizations
- University of Washington