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    • Blue Whale Sound Production Recorded at SanctSound Site MB02_03

    Metadata Updated: June 16, 2023

    This record represents blue whale sound production detected from raw passive acoustic data. Blue whale B calls were detected using Triton's Blue Whale B Call Detector Remora. The detector uses spectrogram correlation (Mellinger and Clark, 2000) to detect calls with a kernel (an average B call) that is generated from a subset of calls. The kernel was calculated from 30 excellent quality B calls that were at least 24 hours apart. A kernel was generated per sanctuary for every six months of data. Kernel quality and optimal threshold settings were tested by running the detector through a subsample of data in which 200-400 calls were manually detected. The comparison between manual and automatic detections was used to calculate precision and recall of the detector, in percentages. Settings were considered optimal when precision and recall were both 85% or higher. These settings were then used to run the detector through the entire dataset for that deployment. Wav files were first decimated to 2 kHz sampling rate. Detector results were manually verified during time periods in which few detections were expected.These data were recorded at SanctSound Site MB02_03 between August 23, 2019 and December 20, 2019.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date June 15, 2023
    Metadata Created Date February 28, 2022
    Metadata Updated Date June 16, 2023
    Reference Date(s) June 15, 2023 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NGDC MGG Passive Acoustic

    Other Data Resources

    Graphic Preview

    Monitoring locations for the SanctSound project. Credit: NOAA

    Additional Metadata

    Resource Type Dataset
    Metadata Date June 15, 2023
    Metadata Created Date February 28, 2022
    Metadata Updated Date June 16, 2023
    Reference Date(s) June 15, 2023 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei.pad:NOAA-Navy-SanctSound_MB02_03_bluewhale
    Access Constraints Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2021. Blue Whale Sound Production Recorded at SanctSound Site MB02_03, SanctSound Data Products. NOAA National Centers for Environmental Information. https://doi.org/10.25921/w76q-bm84. [access date].
    Bbox East Long -121.9084
    Bbox North Lat 36.6495
    Bbox South Lat 36.6495
    Bbox West Long -121.9084
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Monitoring locations for the SanctSound project. Credit: NOAA
    Graphic Preview File https://www.ngdc.noaa.gov/mgg/pad/SanctSound/20181009-sound-monitoring-locations-1000.jpg
    Graphic Preview Type jpeg
    Harvest Object Id 580f3276-d015-462b-9ac7-8e30f3107ae2
    Harvest Source Id 8812445c-2f10-47c5-80d9-c1bc92ca956d
    Harvest Source Title NGDC MGG Passive Acoustic
    Licence
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Point", "coordinates": [-121.9084, 36.6495]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2019-08-23T01:00:00Z
    Temporal Extent End 2019-12-20T19:00:00Z

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