Sponsor
We would like to thank the Office of Naval Research for supporting the NESBA Signals and Noise Experiment and the analysis presented here.
Published In
The Journal of the Acoustical Society of America
Document Type
Article
Publication Date
4-2025
Subjects
Seabeds -- geoacoustic properties
Abstract
Wind-generated, ocean ambient sound data were used to characterize seabed properties along a track in the New England Mud Patch. A 15-m vertical array, consisting of 16 hydrophones, collected ambient sound data across the 50–5000 Hz frequency band. The array drifted for 1 h, covering a 1.7 km track. Seabed characterization was performed using beamforming techniques, which limited the analysis to the 400–700 Hz band. Passive fathometer processing was applied to estimate the water–seabed interface and sub-bottom layering. Additionally, the data were used to estimate the power reflection coefficient, which was then used as input for a trans-dimensional geoacoustic inversion. The results showed the track had slight range dependence, which was evident in the layering structure. The estimated seabed properties—sound speed, density, and attenuation—were consistent along the track but also showed slight range-dependent variability.
Rights
Copyright (c) 2025 The Authors
This work is licensed under a Creative Commons Attribution 4.0 International License.
Locate the Document
DOI
10.1121/10.0036386
Persistent Identifier
https://archives.pdx.edu/ds/psu/43563
Citation Details
Siderius, M., Dosso, S., & Granger, B. (2025). Seabed characterization using ambient sound for a range-dependent track in the New England Mud Patch. The Journal of the Acoustical Society of America, 157(4), 3169-3179.