NOAA-Navy Sanctuary Soundscape Monitoring Project, Sound Pressure Spectral Density, Channel Islands, SanctSound_CI01_03_PSD_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 sound pressure spectral density (PSD) levels derived from raw passive acoustic data. The hourly PSD levels were calculated as the median of mean-square pressure amplitude (µPa^2) with a frequency resolution of 1 Hz from 20 Hz to 24,000 Hz over no less than 1,800 seconds in each hour and converted to decibels (dB re 1 µPa^2/Hz). These data were recorded at SanctSound Site CI01_03 between August 14, 2019 and October 08, 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. Sound Pressure Spectral Density at 1 Hertz and 1 Hour Resolution Recorded at SanctSound Site CI01_03, SanctSound Data Products. NOAA National Centers for Environmental Information. Accessed [date]. DOI: https://doi.org/http://doi.org/10.25921/w67j-g061
comment=Data quality: Hydrophone sensitivity drifted starting 05-Sep-2019 resulting in gradually decreasing received levels
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 (34.04383 -120.081)
history=Sound pressure spectral density (PSD) levels in units of 1 µPa^2/Hz were calculated using Welch's Method in Matlab (FFT length = 48,000 points, Hann window length = 48,000, FFT overlap = 0%), resulting in PSD estimates of mean-square pressure amplitude (µPa^2) with a frequency resolution of 1 Hz and temporal resolution of 1 second. For every 1-Hertz (Hz) frequency band from 20 Hz to 24,000 Hz, PSD levels per hour were calculated as the median of mean-square pressure amplitude (µPa^2) over no less than 1,800 seconds for that hour. PSD levels per hour for each frequency band were converted to decibels (dB re 1 µPa^2/Hz). 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/w67j-g061
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=2019-09-04T23:00:00Z
time_coverage_start=2019-08-14T00:00:00Z

美国国家海洋和大气管理局（NOAA）与美国海军携手致力于深入研究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合作，对七个国家海洋保护区和一处海洋国家纪念地（包括夏威夷岛以及东海岸和西海岸附近海域）内的声音进行研究。标准化的测量方法将评估海洋动物、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。这项工作是对海军和NOAA持续研究工作的延续，包括NOAA国家海洋保护区办公室的努力。该数据集代表了存储于NOAA国家环境信息中心的原声数据派生产品。