A real-time acoustic drifter for active and passive sonar applications

A low-cost, long-duration acoustic drifter has been developed to measure directional ambient noise and man-made acoustic signals in both shallow and deep oceans. Traditional acoustic and oceanographic measurements are typically performed by deploying fixed moorings that would limit retrieving the da...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2019-10, Vol.146 (4), p.2749-2749
Main Authors: Turgut, Altan, Schindall, Jeffrey
Format: Article
Language:English
Online Access:Get full text
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Summary:A low-cost, long-duration acoustic drifter has been developed to measure directional ambient noise and man-made acoustic signals in both shallow and deep oceans. Traditional acoustic and oceanographic measurements are typically performed by deploying fixed moorings that would limit retrieving the data only after the recovery. With the advancements in low-power CPUs and satellite telemetry, real-time oceanographic and acoustic measurements are possible with in-buoy data reduction and satellite transmission of processed data. A Raspberry Pi computer with a 16-channel data acquisition board is used for both active and passive sonar applications, including directional ambient measurements, seabed characterization, and ocean acoustic tomography. A specific version of the acoustic drifter was built for on-ice deployments in the Arctic as an ice-tethered acoustic buoy. Several examples of its applications from recent sea-going experiments are given. Successful deployments and instant data analysis would indicate a practical alternative to more traditional acoustic and oceanographic measurement techniques by providing a real-time monitoring capability. [Work supported by the ONR.]
ISSN:0001-4966
1520-8524
DOI:10.1121/1.5136517