ERDDAP > info > noaaSanctSound_CI04_01_BB_1h

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
data			graph		files	public	NOAA-Navy Sanctuary Soundscape Monitoring Project, Broadband Sound Pressure Levels, Channel Islands, SanctSound_CI04_01_BB_1h		M	background			NOAA	noaaSanctSound_CI04_01_BB_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 broadband (BB) sound pressure levels (SPLs) derived from raw passive acoustic data. BB SPLs were calculated by integration of sound pressure spectral density estimates of the mean-square pressure with a 1 Hz/1 second resolution over the frequency band of 20 to 24,000 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 CI04_01 between November 01, 2018 and December 31, 2018.
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. Broadband Sound Pressure Levels at 1 Hertz and 1 Hour Resolution Recorded at SanctSound Site CI04_01, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/y6qz-xq36
attribute	NC_GLOBAL	comment	String	Data quality: Data quality is compromised for frequencies less than 100 Hz from 2018-11-28 to 2018-12-30. Recorded received level gradually decreases after 2018-11-28 for frequencies below 100 Hz. This drift is caused by changes in 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/
attribute	NC_GLOBAL	date_created	String	2022-08-22
attribute	NC_GLOBAL	date_issued	String	2022-08-22
attribute	NC_GLOBAL	featureType	String	TimeSeries
attribute	NC_GLOBAL	geospatial_bounds	String	POINT (33.849 -120.118)
attribute	NC_GLOBAL	history	String	Broadband (BB) sound pressure levels (SPLs) 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 the frequency band of 20 to 24,000 Hz. The resulting BB SPLs with the 1 second resolution were then used to calculate BB SPLs per hour as a median over no less than 1,800 1-second values for that hour. The BB SPLs 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/y6qz-xq36
attribute	NC_GLOBAL	infoUrl	String	https://ncei.noaa.gov
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 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
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	2018-12-30T10:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2018-11-01T20:00:00Z
attribute	NC_GLOBAL	title	String	NOAA-Navy Sanctuary Soundscape Monitoring Project, Broadband Sound Pressure Levels, Channel Islands, SanctSound_CI04_01_BB_1h
dimension	time		double	nValues=1407, evenlySpaced=true, averageSpacing=1h 0m 0s
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.5411024E9, 1.546164E9
attribute	time	axis	String	T
attribute	time	comment	String	Start time of 1 hour bin over which sound pressure levels are calculated
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
variable	sound_pressure_levels		double	time
attribute	sound_pressure_levels	cell_methods	String	time: sum
attribute	sound_pressure_levels	comment	String	Broadband Sound Pressure Levels
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

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.