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SanctSound Hybrid Millidecade Spectra

browse graphicRepresentative SanctSound hybrid millidecade spectra image
To understand natural and anthropogenic sound in the ocean, and to compare underwater soundscapes globally, standard methods of analysis must be applied to passive acoustic monitoring (PAM) data. Methods that balance constrained volume and adequate resolution of acoustic spectra have recently been published (Martin et al., 2021a,b). A community effort supported by NOAA, BOEM, U.S. Navy, and ONR was initiated to apply these methods to PAM datasets from around the world. These data are hybrid millidecade (HMD) spectra of sound levels derived from calibrated passive acoustic data. Daily HMD at 1 minute resolution were created using standalone MANTA software (v9.6.13) from audio data recorded by the SanctSound monitoring project at various sites.
  • Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2023. Hybrid Millidecade Spectra at 1 Minute Resolution Recorded for the Sanctuary Soundscape Monitoring Project (SanctSound). NOAA National Centers for Environmental Information. https://doi.org/10.25921/ymf8-5k59. [access date]
gov.noaa.ncei.pad:SanctSound_HMD
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Search Data
Download Data
  • Google Cloud Storage (download)
    Google Cloud Storage providing public access to passive acoustic data through the NOAA Big Data Project.
Distribution Formats
  • hybrid millidecade spectra (.nc)(Version:1)
    • File Specification: Each file represents one day of hybrid millidecade spectra at one minute resolution.
Ordering Instructions Contact NCEI for other distribution options and instructions.
Distributor NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Passive Acoustic Data Manager
Passive Acoustic Data Manager
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce

pad.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2021-01-26T20:00:00 to 2021-03-21T18:20:00
Spatial Bounding Box Coordinates
West:-180.0
East:-180.0
South:-90.0
North:90.0
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2023-06-05
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency As needed
Purpose Purpose statement not available
Dataset Citation
  • Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2023. Hybrid Millidecade Spectra at 1 Minute Resolution Recorded for the Sanctuary Soundscape Monitoring Project (SanctSound). NOAA National Centers for Environmental Information. https://doi.org/10.25921/ymf8-5k59. [access date]
Principal Investigators
  • Timothy Rowell
    NEFSC
  • Sofie Van Parijs
    NOAA/NEFSC
  • Leila Hatch
    Stellwagen Bank National Marine Sanctuary
Publishers
  • NOAA National Centers for Environmental Information
Acknowledgments
  • This project received funding from the NOAA ONMS
  • This project received funding from the US Navy Living Marine Resources
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Biological Classification > Animals/Vertebrates > Fish
  • Earth Science > Biological Classification > Animals/Vertebrates > Mammals > Cetaceans
  • Earth Science > Oceans > Ocean Acoustics
  • Earth Science > Oceans > Aquatic Sciences > Fisheries
  • Earth Science > Oceans > Marine Environment Monitoring
  • Earth Science > Oceans > Ocean Acoustics > Ambient Noise
  • Earth Science > Biosphere > Aquatic Ecosystems
  • Earth Science > Biosphere > Ecosystems > Marine Ecosystems
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • Fixed Observation Stations
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • Recorders/Loggers > Passive Acoustic Recorder
  • Acoustic Sounders > Hydrophones
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Ocean > Pacific Ocean > Eastern Pacific Ocean
  • Ocean > Atlantic Ocean > North Atlantic Ocean
Use Constraints
  • 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.
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.
Other Constraints Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2023. Hybrid Millidecade Spectra at 1 Minute Resolution Recorded for the Sanctuary Soundscape Monitoring Project (SanctSound). NOAA National Centers for Environmental Information. https://doi.org/10.25921/ymf8-5k59. [access date]
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for:series
Processing Steps
  • Data analysis was performed using the Making Ambient Noise Trends Accessible (MANTA, https://bitbucket.org/CLO-BRP/manta-wiki/wiki/Home, see Miksis-Olds et al., 2021; Martin et al., 2021a,b) standalone software (Version 9.6.13) to produce hybrid millidecade spectra of sound levels from ocean audio recordings. To efficiently tackle large datasets, MANTA is designed around a parallel-processing Matlab package, Raven-X (Dugan et. al., 2014, 2016, and 2018) that uses ordinary multi-core computers to accelerate processing speeds. MANTA calculates the sound pressure spectral density (PSD) levels in units of 1 µPa^2/Hz using Welch's Method in Matlab. The Discrete Fourier Transform length is equal to the sample rate, a Hann window of equal length is applied to the data and 50% overlap is used. This results in PSD estimates of mean-square pressure amplitude (µPa^2) with a frequency resolution of 1 Hz and temporal resolution of 1 second. The 120 PSD estimates from each 1-minute segment were averaged, and the average spectrum for each minute was further processed to a hybrid millidecade (HMD) spectrum as dB re 1 µPa^2/Hz, as defined in Martin et al. (2021b). Hybrid millidecades are an efficient means of storing PSD spectra from high sample rate audio files using 1-Hz values up to 435 Hz, then millidecade wide PSD values up to one half of the sampling rate (Martin et al., 2021b). The MANTA outputs for each day are: (1) CSV of the 1 minute HMD results; (2) image of the daily long-term spectral average based on the 1 minute HMD results, (3) image of the daily spectral probability density with percentiles, and (4) NetCDF containing products 2 and 3 in addition to a deployment-level MANTA Metadata output file containing the associated frequency-dependent calibration data used to compute the calibrated spectrum levels.
Acquisition Information (collection)
Instrument
  • SoundTrap 300
Platform
  • Mooring
Last Modified: 2023-10-20
For questions about the information on this page, please email:ncei.info@noaa.gov