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September 10, 2025

Vector acoustic properties of acoustic modes as generated from explosive sources in a shallow-water waveguide

Key Points

Vector acoustic measurements uncover structures in the sound field, enhancing sediment characterization.
Analysis of 32 explosive SUS charges showed significant dispersion across four modes, aiding in acoustic property detection.
Comparisons with the acoustic normal mode model ORCA help validate the findings against geoacoustic models.
The research highlights potential applications for accurately locating acoustic modes in seafloor studies.

Abstract

Vector acoustic measurements of explosive sources can show structure in the sound field that is not discernible from traditional pressure-only measurement. This structure, derived from coherent combinations of acoustic velocity and pressure, is known to be sensitive to sediment layering and composition. Measurements made during the 2022 Seabed Characterization Experiment along a range-independent section of the New England Mud Patch (NEMP) are presented. Recordings of 32 explosive SUS charges at ranges of 4–15 km show significant dispersion of 4 modes allowing for vector properties of individual modes to be inferred. These vector properties are compared with results from the acoustic normal mode model ORCA based on a nominal geoacoustic model of the NEMP. The results are analyzed for their usefulness in locating modes and characterizing seafloor acoustic properties.

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Cite This Study

Drinnan et al. (Tue,) studied this question.

synapsesocial.com/papers/68c1abf954b1d3bfb60e40e2 https://doi.org/https://doi.org/10.1121/10.0038264

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