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Experimental testing of detection, localization, and call density of synthetic sounds using Navy surplus sonobuoys.

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: May 05, 2026 at 08:56 PM | Dataset Last Updated: May 23, 2014 at 12:00 AM
A series of synthesized sounds were played back from multiple locations around and within a grid of four DIFAR sonobuoys. Four type 53F DIFAR sonobuoys with attached SPOT GPS devices were deployed in a square with ~1nmi (2km) between each sonobuoy. Sound sources include periodic deployment of weighted light bulbs (producing an impulsive sound when the bulb implodes at depth) and synthetic tonal sounds broadcast through an underwater speaker. A time-synchronized multi-channel recording was made of the sounds received on the four sonobuoys. These experimental data have been used for multiple studies including testing methods to estimate sonobuoy drift, testing novel methods for detection and localization of sonobuoy signals, and testing methods for Acoustic Spatial Capture-Recapture (ASCR) methods for estimating call density. We encourage use of these methods for additional research and development.

Resources

9 resources available

  • Metadata Landing Page

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  • Passive Acoustic Data Site

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  • Passive Acoustic Data Map Viewer

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  • Google Cloud Storage

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  • SONOBUOY ACOUSTIC DATA COLLECTION DURING CETACEAN SURVEYS

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  • Estimating drift of directional sonobuoys from acoustic bearings

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  • Displaying bioacoustic directional information from sonobuoys using "azigrams"

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  • Global Change Master Directory (GCMD) Keywords

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  • NCEI Contact Information

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