Broadband acoustic wave propagation in waveguide with variable properties
Abstract
Transmission Loss (TL) prediction is an important problem in underwater acoustics. The main challenge in its assessment is understan ding the contribution of various waveguide parameters such as inhomogeneities in seabed properties, the spatial and temporal variabi lities in the water column sound speed profile (SSP), and the sea surface roughness. A generalized definition of the acoustic wavegu ide that was originally introduced by Pekeris in 1948 is still a high-profile research topic in ocean acoustics. Our long-term goal is to study the physics of waveguides through learning from at-sea experimental data whereby the cause and effect of these interacti ons and inherent uncertainty in acoustic signal propagation due to interaction with ocean environment could be assessed. We utilize state-of-the-art 2D and 3D acoustic models to aid our analysis. The scope of our research and this proposal covers analytical, numer ical, and experimental studies. Our objective in this proposal is to conduct research in support of ONR Ocean Acoustics program usin g the knowledge base and experience gained from major ONR research initiatives including the Shallow Water Acoustic propagation in R andom Media (SWARM95), Shallow Water Acoustic Experiment 2006 (SW06), Kauai High Frequency Experiments (2003-2011), Arctic experimen t in 2017 (CANAPE17), and the Seabed Characterization Experiment 2017 (SBCEX17). Topics of our study in this proposal are assessment of mid-frequency (1.5 - 4 kHz) signal attenuation due to sea bottom, water column effects on ice covered ocean for 0.7 to 1.1 kHz, and dynamics of the signal variations due 3D water column fluctuations (0.8 - 16 kHz).Approved for Public Release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 20, 2021
- Source ID
- N000142112760
Entities
People
- Mohsen Badiey
Organizations
- Office of Naval Research
- United States Navy
- University of Delaware