NOAA-Navy Sanctuary Soundscape Monitoring Project, Octave Sound Pressure Levels, Gray's Reef, SanctSound_GR03_02_OL_1h

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.
abstract=This record represents the octave band sound pressure levels (OLs) derived from raw passive acoustic data. OLs were calculated by integration of sound pressure spectral density estimates of the mean-square pressure with a 1 Hz/1 second resolution over 10 octave bands with the center frequencies ranging from 31.5 to 16,000 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 GR03_02 between May 02, 2019 and September 09, 2019.
acknowledgement=This project received funding from the U.S. Navy.
cdm_data_type=TimeSeries
citation=Cite as: NOAA Office of National Marine Sanctuaries and U.S Navy. 2021. Octave Band Sound Pressure Levels at 1 Hertz and 1 Hour Resolution Recorded at SanctSound Site GR03_02, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/48en-8347
comment=Data quality: A 20 Hz high pass filter is integrated into the instrument; thus, data below 20 Hz is reduced in ampitude and uncalibrated. The first 4 hour file was missing after turning on the instrument; thus the delay in data after deployment. Gap in data from 2019-07-06 16:00:41 UTC to 2019-07-06 16:05:54 UTC. Weird noise after card switch was removed from 2019-07-06 16:05:54 - 16:05:57 (3 sec extra removed). The fixed hydrophone mooring was moved after an interaction with something to a different habitat on June 13th, 2019. The fixed hydrophone mooring was impacted by Hurricane Dorian on September 4th, 2019, where the instrument was further moved. Hydrophone was found about 30 ft from original site at N 31 22.051, W -80 53.694. Reductions in sound levels (received levels) in frequencies above 1 kHz were observed after 21:20:00 13-June-2019 and were further observed after 15:47:00 4-September-2019. Levels may differ from what would be expected if the hydrophone was not moved or impacted by the two hurricanes.

contributor_name=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
contributor_role=Principal Investigator
Conventions=COARDS, CF-1.6, ACDD-1.3
defaultGraphQuery=sound_pressure_levels[][]&.draw=surface&.vars=time|frequency|sound_pressure_levels&.yRange=||true|Log
featureType=TimeSeries
geospatial_bounds=POINT (31.36749 -80.895)
history=Octave band sound pressure levels (OLs) 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 10 octave bands (ISO266-1997) with the center frequencies ranging from 31.5 to 16,000 Hz. The resulting OLs with 1 second resolution were then used to calculate hourly OLs as a median over no less than 1,800 1-second values for that hour. The OLs 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).
id=http://doi.org/10.25921/48en-8347
infoUrl=https://ncei.noaa.gov
institution=NOAA
instrument=SoundTrap ST500
keywords_vocabulary=GCMD Science Keywords
naming_authority=NOAA-Navy
project=NOAA-Navy Sanctuary Soundscape Monitoring Project
sourceUrl=(local files)
standard_name_vocabulary=CF Standard Name Table v55
time_coverage_end=2019-09-09T09:00:00Z
time_coverage_start=2019-05-02T00:00:00Z

美国国家海洋和大气管理局（NOAA）及美国海军正致力于深入理解美国国家海洋保护区系统内的水下声音。自2018年至2021年，这些机构将与众多科学合作伙伴携手研究七个国家海洋保护区和一处海洋国家纪念区的声音，包括夏威夷群岛以及东、西海岸海域。标准化的测量将评估海洋动物、物理过程（例如风和波浪）以及人类活动产生的声音。汇总这些信息将有助于NOAA和海军测量保护区内的声音水平和声学基线条件。此研究是NOAA海洋保护区办公室与海军持续研究工作的延续，包括NOAA海洋保护区办公室的努力。该数据集代表从NOAA国家环境信息中心存档的原始声学数据中派生出的产品。