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 data       graph     files  public NOAA-Navy Sanctuary Soundscape Monitoring Project, One-third Octave Sound Pressure Levels,
Channel Islands, SanctSound_CI02_01_TOL_1h
   ?        I   M   background (external link) RSS Subscribe NOAA noaaSanctSound_CI02_01_TOL_1h

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL abstract String This record represents the one-third octave band sound pressure levels (TOLs) derived from raw passive acoustic data. TOLs were calculated by integration of sound pressure spectral density estimates of the mean-square pressure with a 1 Hz/1 second resolution over 30 one-third octave bands with the nominal center frequencies ranging from 25 to 20,000 Hz. The result is then calculated per hour as a median over no less than 1,800 1-second values for that hour and converted to decibels (dB re 1 µPa). These data were recorded at SanctSound Site CI02_01 between October 31, 2018 and January 13, 2019.
attribute NC_GLOBAL acknowledgement String This project received funding from the U.S. Navy.
attribute NC_GLOBAL cdm_data_type String TimeSeries
attribute NC_GLOBAL citation String Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2021. One-third Octave Band Sound Pressure Levels at 1 Hertz and 1 Hour Resolution Recorded at SanctSound Site CI02_01, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/0rjr-zp13
attribute NC_GLOBAL comment String Data quality: Recorded received level gradually decreases after 2018-11-30 for the frequencies below 200 Hz. This drift is caused by changes in the hydrophone sensitivity.
attribute NC_GLOBAL contributor_name String Simone Baumann-Pickering, Scripps Institution of Oceanography; Leila Hatch, NOAA Stellwagen Bank National Marine Sanctuary; John Joseph, U.S. Naval Postgraduate School; Anke Kuegler, Hawai'i Institute of Marine Biology, University of Hawai'i at Manoa; Marc Lammers, NOAA Hawaiian Islands Humpback Whale National Marine Sanctuary; Tetyana Margolina, U.S. Naval Postgraduate School; Karlina Merkens, NOAA Pacific Islands Fisheries Science Center; Lindsey Peavey Reeves, NOAA Channel Islands National Marine Sanctuary; Timothy Rowell, NOAA Northeast Fisheries Science Center; Jenni Stanley, Woods Hole Oceanographic Institution; Alison Stimpert, Moss Landing Marine Laboratories; Sofie Van Parijs, NOAA Northeast Fisheries Science Center; Eden Zang,NOAA Hawaiian Islands Humpback Whale National Marine Sanctuary
attribute NC_GLOBAL contributor_role String Principal Investigator
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String ncei.info at noaa.gov
attribute NC_GLOBAL creator_name String NOAA NCEI
attribute NC_GLOBAL creator_url String https://www.ncei.noaa.gov/ (external link)
attribute NC_GLOBAL date_created String 2022-03-21
attribute NC_GLOBAL date_issued String 2022-03-21
attribute NC_GLOBAL defaultGraphQuery String sound_pressure_levels[][]&.draw=surface&.vars=time|frequency|sound_pressure_levels&.yRange=||true|Log
attribute NC_GLOBAL featureType String TimeSeries
attribute NC_GLOBAL geospatial_bounds String POINT (34.0856 -120.5232)
attribute NC_GLOBAL history String One-third octave band sound pressure levels (TOLs) in units of µPa^2 were calculated by integration of sound pressure spectral density (PSD) estimates of the mean-square pressure (µPa^2) with a 1 Hertz (Hz)/1 second resolution over each of 30 one-third octave bands with the nominal center frequencies ranging from 25 to 20,000 Hz (IEC 61260-1995). The resulting TOLs with the 1 second resolution were then used to calculate hourly TOLs as a median over no less than 1,800 1-second values for that hour. The TOLs per hour were converted to decibels (dB re 1 µPa). Data were processed with Triton - Soundscape Metrics Remora (Github commit '44f0f20'; Feb 9, 2020) and Matlab (2016b and newer; statistics toolbox).
attribute NC_GLOBAL id String http://doi.org/10.25921/0rjr-zp13 (external link)
attribute NC_GLOBAL infoUrl String https://ncei.noaa.gov (external link)
attribute NC_GLOBAL institution String NOAA
attribute NC_GLOBAL instrument String SoundTrap ST500
attribute NC_GLOBAL keywords String acoustic attenuation/transmission, acoustics, ambient noise, aquatic ecosystems, cetacean, environmental, fish, frequency, intensity, marine environment monitoring, marine habitat, national centers for\n environmental information, Navy, NOAA, ocean acoustics, oceans, office of national marine sanctuaries, passive acoustic recorder, pressure, sound_intensity_level_in_water, soundscapes
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but are not intended for legal use, since it may contain inaccuracies. Neither the data creator, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute NC_GLOBAL naming_authority String NOAA-Navy
attribute NC_GLOBAL project String NOAA-Navy Sanctuary Soundscape Monitoring Project
attribute NC_GLOBAL publisher_email String erd.data at noaa.gov
attribute NC_GLOBAL publisher_name String NOAA NMFS SWFSC ERD
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL publisher_url String https://www.pfeg.noaa.gov (external link)
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String NOAA and the U.S. Navy are working to better understand underwater sound within the U.S. National Marine Sanctuary System. From 2018 to 2021, these agencies will work with numerous scientific partners to study sound within seven national marine sanctuaries and one marine national monument, which includes waters off Hawai'i and the east and west coasts. Standardized measurements will assess sounds produced by marine animals, physical processes (e.g., wind and waves), and human activities. Collectively, this information will help NOAA and the Navy measure sound levels and baseline acoustic conditions in sanctuaries. This work is a continuation of ongoing Navy and NOAA research, including efforts by NOAA's Office of National Marine Sanctuaries This dataset represents the derived products from the raw acoustic data that are archived at NOAA National Centers for Environmental Information.
attribute NC_GLOBAL time_coverage_end String 2018-11-30T23:00:00Z
attribute NC_GLOBAL time_coverage_start String 2018-10-31T20:00:00Z
attribute NC_GLOBAL title String NOAA-Navy Sanctuary Soundscape Monitoring Project, One-third Octave Sound Pressure Levels, Channel Islands, SanctSound_CI02_01_TOL_1h
dimension time   double nValues=724, evenlySpaced=true, averageSpacing=1h 0m 0s
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.541016E9, 1.5436188E9
attribute time axis String T
attribute time bounds String time_bounds
attribute time ioos_category String Time
attribute time long_name String Time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00:00Z
attribute time units String seconds since 1970-01-01T00:00:00Z
dimension frequency   double nValues=30, evenlySpaced=false, averageSpacing=688.7931034482758
attribute frequency actual_range double 25.0, 20000.0
attribute frequency comment String Frequency resolution of 1 Hz
attribute frequency ioos_category String Other
attribute frequency long_name String frequency
attribute frequency standard_name String sound_frequency
attribute frequency time_precision String 1970-01-01T00:00:00Z
attribute frequency units String Hz
variable sound_pressure_levels   double time, frequency
attribute sound_pressure_levels cell_methods String time: sum
attribute sound_pressure_levels colorBarMaximum double 110.0
attribute sound_pressure_levels colorBarMinimum double 50.0
attribute sound_pressure_levels comment String One-third octave band center frequency.
attribute sound_pressure_levels ioos_category String Pressure
attribute sound_pressure_levels long_name String sound pressure levels
attribute sound_pressure_levels standard_name String sound_intensity_level_in_water
attribute sound_pressure_levels units String dB
variable time_stamp   double time, frequency
attribute time_stamp axis String T
attribute time_stamp colorBarMaximum double 110.0
attribute time_stamp colorBarMinimum double 50.0
attribute time_stamp ioos_category String Time
attribute time_stamp long_name String Timestamp in ISO 8601 date format
attribute time_stamp standard_name String time
attribute time_stamp units String s

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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