Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Blue Whale Sound Production Recorded at SanctSound Site MB01_09

Metadata Updated: March 1, 2024

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 MB01_09 between August 11, 2021 and November 21, 2021.

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 December 6, 2023
Metadata Created Date April 20, 2022
Metadata Updated Date March 1, 2024
Reference Date(s) June 15, 2023 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NGDC MGG Passive Acoustic

Graphic Preview

Monitoring locations for the SanctSound project. Credit: NOAA

Additional Metadata

Resource Type Dataset
Metadata Date December 6, 2023
Metadata Created Date April 20, 2022
Metadata Updated Date March 1, 2024
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_MB01_09_bluewhale
Access Constraints Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2022. Blue Whale Sound Production Recorded at SanctSound Site MB01_09, SanctSound Data Products. NOAA National Centers for Environmental Information. https://doi.org/10.25921/4804-gb89. [access date]., 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.
Bbox East Long -121.9758
Bbox North Lat 36.798
Bbox South Lat 36.798
Bbox West Long -121.9758
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 a22404c6-1283-4721-8b72-ac175d029058
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": [-121.9758, 36.798]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2021-08-11T20:00:00Z
Temporal Extent End 2021-11-21T09:00:00Z

Didn't find what you're looking for? Suggest a dataset here.