ERDDAP > info > noaaSanctSound_CI02_01_bocaccio

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, Bocaccio Sound Production, Channel Islands, SanctSound_CI02_01_bocaccio		I   M	background			NOAA	noaaSanctSound_CI02_01_bocaccio

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	abstract	String	This record represents bocaccio calls detection from raw passive acoustic data. Calls were detected automatically using Triton's Fish Detector. Recordings were first decimated to a sample rate of 2 kHz. The fish detector filtered the time series between 100 and 950 Hz, and computed cross-correlation between the envelope of a filtered example call and 75s of the envelope of the filtered time series. To detect signals within varying background noise, we used a floating threshold of the median cross correlation value over the current 75 s of data, with a threshold offset of 2e-9 above the median. Detections were evaluated if they reached above this threshold. Consecutive calls were required to have a minimum time gap of 0.5 s to be detected separately. RMS received level was computed over the potential detection period and a time series of the length of the bocaccio call template before and after the detection. Detections were considered false and discarded if the signal-to-noise ratio between the detection period and the timeseries before and after the detection was less than 0.01. The threshold was evaluated based on the distribution of histograms of manually verified true and false detections. A trained analyst verified the detections as true or false.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. Bocaccio Sound Production Recorded at SanctSoundSite CI02_01, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/2ygd-gn27
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/
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 (34.0856 -120.5232)
attribute	NC_GLOBAL	history	String	Bocaccio calls were detected automatically using the Fish Detector in Triton version 1.93 (Scripps Whale Acoustics Lab, San Diego, CA). Recordings were decimated to a sample rate of 2,000 Hz before running through the detector. The fish detector first filtered the time series between 100 and 950 Hz (10th order Butterworth filter). Then, it computed cross-correlation between the envelope of a filtered example call (3 s, Hann windowed) and 75s of the envelope of the filtered time series (i.e., Hilbert transform low pass filter). To enhance peaks in the signal, the cross correlation was squared. To account for detecting signals within background noise, we used a floating threshold of the median cross correlation value over the current 75 s of data, with a threshold offset of 2e-9 above the median. Detections were evaluated if they reached above this threshold. Consecutive calls were required to have a minimum time gap of 0.5 s to be detected separately. RMS received level was computed over the potential detection period and a time series of the length of the bocaccio call template before and after the detection. Detections were considered false and discarded if the signal-to-noise ratio between the detection period and the timeseries before and after the detection was less than 0.01. The threshold was evaluated based on the distribution of histograms of manually verified true and false detections. After running the detector, a trained analyst verified the detections as true or false. Data were processed with Triton - (1.93.20160524/Github version d81e5fa) and Matlab (2016b and newer; statistics toolbox).
attribute	NC_GLOBAL	id	String	http://doi.org/10.25921/2ygd-gn27
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	title	String	NOAA-Navy Sanctuary Soundscape Monitoring Project, Bocaccio Sound Production, Channel Islands, SanctSound_CI02_01_bocaccio
dimension	start_time		double	nValues=401, evenlySpaced=false, averageSpacing=15662.622354999781
attribute	start_time	actual_range	double	1.5410370637580001E9, 1.5473021127E9
attribute	start_time	axis	String	T
attribute	start_time	comment	String	Start time of detections. Corresponding end time for detection in end_time_var at same index value as start_time_var.
attribute	start_time	ioos_category	String	Time
attribute	start_time	long_name	String	Start Time
attribute	start_time	standard_name	String	time
attribute	start_time	time_origin	String	01-JAN-1970 00:00:00
attribute	start_time	time_precision	String	1970-01-01T00:00:00.000Z
attribute	start_time	units	String	seconds since 1970-01-01T00:00:00Z
variable	bocaccio_presence		double	start_time
attribute	bocaccio_presence	cell_methods	String	time: sum (comment: presence (1) or absence (0) over time interval)
attribute	bocaccio_presence	comment	String	Presence of bocaccio calls (0 = not present; 1 = present)
attribute	bocaccio_presence	ioos_category	String	Statistics
attribute	bocaccio_presence	long_name	String	bocaccio presence
attribute	bocaccio_presence	standard_name	String	bocaccio_presence
attribute	bocaccio_presence	units	String	boolean
variable	end_time		double	start_time
attribute	end_time	actual_range	double	1.541037063815E12, 1.547302113632E12
attribute	end_time	axis	String	T
attribute	end_time	comment	String	End time of detections. Corresponding start time for detection in start_time_var at same index value as end_time_var.
attribute	end_time	ioos_category	String	Time
attribute	end_time	long_name	String	End Time
attribute	end_time	standard_name	String	end_time
attribute	end_time	time_origin	String	01-JAN-1970 00:00:00
attribute	end_time	units	String	seconds since 1970-01-01T00:00:00Z

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.