19:I[42426,["/_next/static/immutable/chunks/1xctgzqre-wsy.js","/_next/static/immutable/chunks/06_-wz6pdtp2b.js","/_next/static/immutable/chunks/30e52g49hg40p.js","/_next/static/immutable/chunks/02yq6tul2z-oh.js","/_next/static/immutable/chunks/10bx_ec2vj7n_.js","/_next/static/immutable/chunks/33bfn03fo8xnt.js","/_next/static/immutable/chunks/0tfjf78scu61b.js","/_next/static/immutable/chunks/31xnvej4n1bi9.js"],"default"] 1a:Ta83,

Beginning in June of 2011, a long-term effort was initiated to record ambient underwater sound within the West Bay Marine Reserve. This was accomplished using a low-power DSG acoustic recorder (Loggerhead Instruments, Sarasota, FL, USA) equipped with an off-the-shelf HTI-96 hydrophone with a sensitivity of -185.8 dBV/μPa and flat frequency response between ~0.1 and 30 kHz (High-Tech Inc., Gulfport Mississippi). The instrument was powered by a set of standard alkaline D-cell batteries. The data were digitized using a 16-bit resolution and written to a standard solid-state SD memory card. All components are housed in a 0.65 m long, 11.5 cm diameter PVC pressure case.

The instrument was deployed near the center of the West Bay Marine Reserve at a depth of ~3 m below MLLW and on an area of flat lying seabed ~10 m from surrounding oyster reef habitat. The pressure case was mounted vertically using a concrete anchor to position the hydrophone element ~1 m off the seabed. The tidal range within West Bay is small, typically <0.75 m.

A total of eight deployments were carried out using a single DSG recorder between 18 June 2011 and 06 July 2012. The resulting time series includes data collected on a total of 321 days over this 384-day monitoring period, which represents an 83% data return rate. Depending on the planned length of the deployment, the instrument was programmed to record for a 60 sec duration at 15-minute intervals, or for a duration of 30 sec at 30-minute intervals. A 50-kHz sampling rate was used for all deployments. The usable bandwidth of the data is taken to be ~0.1-20.0 kHz, as the DSG applies an anti-alias filter prior to A/D conversion. In total, 27,565 separate recordings were made as part of this monitoring initiative.

The data may be read into MATLAB using the included function DSGread.m (from Loggerhead Instruments).

Example:
% Set calibration and gain
hydro_cal=-185.8;
DSG_gain=10; % or 20

% Load DSG file
% DF_HEAD and SID_SPEC are structures with file information
% (e.g. record date and time)
% datacat are data strung together and scaled to +/-1 by MATLAB
[DF_HEAD,SID_SPEC,totrecs,datacat]=DSGread(FileName,0,0);

% convert to uPa
VoltsPeruPa=power(10,(hydro_cal+DSG_gain)/20);
datacat=datacat/VoltsPeruPa;

% plot
srate=1000000/(SID_SPEC.SP256/256);
t=[0:length(datacat)-1]/srate; %create time scale
figure(1)
plot(t,datacat);
xlabel('Time (s)');
ylabel('Sound Level (uPa)');

% Calculate rms SPL (dB re 1uPa)
rmsdB=20*log10(std((datacat-mean(datacat)))) %calculate dB re 1uP

1b:T6bf,The overall goal of this study is to advance our general understanding of the role of underwater sound in biological oceanography by characterizing spatiotemporal variation in an estuarine soundscape, and determine if this variation affects the settlement of larval invertebrates. The investigators will use larval bivalves and subtidal oyster reefs in Pamlico Sound, North Carolina as a study system. A combination of field and laboratory experiments will be used to test the effects of sound on larval behaviors and settlement. The underwater sonic environment has the potential to provide meaningful sensory information to all aquatic animals. Acoustic signals are transmitted relatively large distances, are present at all depths, and reflect biological and physical characteristics of the environment, while other cues (e.g. light, chemicals) are rapidly attenuated from the source. Sound is well established as an orientation and habitat selection cue for marine mammals and fishes, and has recently emerged as a potentially important contributor to larval settlement. Building capacity (knowledge, expertise, equipment) for integrating geophysical aspects of underwater sound propagation with ecological and oceanographic processes is central to bio-physical studies of larval connectivity and recruitment in marine systems. It also informs our understanding of the potential adverse effects of noise pollution in the ocean and may elucidate untested benefits of marine reserves - ultimately leading to healthier and better managed oceans and estuaries. The project supports graduate, postdoctoral and undergraduate student training, as well as educational outreach programs that span local, regional and national levels6:["$","$L19",null,{"dataset":{"_id":"628710","description":"

This dataset contains passive acoustic recordings from a mid-latitude oyster reef in Pamlico Sound, North Carolina, USA. Each file contains raw acoustic records collected using a DSG hydrophone recorder (Loggerhead Instruments) deployed near the center of West Bay Marine Reserve between June 2011 and July 2012. The hydrophone was configured to record 60 or 30 seconds of data every 15 or 30 minutes (depending on the deployment duration). The sample rate for each deployment was 50,000 Hz.

Related References:

Additional information about this dataset can be found in:

Bohnenstiehl, D.R., Lillis, A., & Eggleston, D.B. (2016). The Curious Acoustic Behavior of Estuarine Snapping Shrimp: Temporal Patterns of Snapping Shrimp Sound in Sub-Tidal Oyster Reef Habitat. PLOS ONE 11(1): e0143691. https://doi.org/10.1371/journal.pone.0143691

\n","problem":"","acquisition":"$1a","processing":"

No processing. These are the raw data files in DSG format.

\n","bcodmoProcessing":"Version 1 (date: 2015-12-09):\r\n- Added conventional header with dataset name, PI name, version date.\r\n- Renamed parameters to BCO-DMO standard.\r\n- Created flat file with submitted metadata including lat and lon, date/time, recording parameters, and links to download the data files.\r\n- Calculated ISO_TimeDate_Local_start and _end.\r\n\r\nVersion 2 (Date: 2024-02-16):\r\n- Replaced the 'file_link' field with 'file_name' in the CSV data file.\r\n- Attached the 8 .zip files as data files. ","title":"Raw files from DSG hydrophone collected from the West Bay Marine Reserve in Pamlico Sound, NC during 2011 (Larval settlement soundscapes project)","nickname":"West Bay 2011-2012 Acoustic Time Series: raw files","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"2","version_date":"2024-02-16T05:00:00.000Z","abstract":"This dataset contains raw files from a DSG hydrophone deployed at the West Bay Marine Reserve in Pamlico Sound, North Carolina, USA during 2011 and 2012.","citation":"David B. Eggleston, DelWayne Bohnenstiehl (2025) Raw files from DSG hydrophone collected from the West Bay Marine Reserve in Pamlico Sound, NC during 2011 (Larval settlement soundscapes project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2024-02-16 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.628710.2 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.628710.2","versionDate":"2024-02-16","versionId":"2","year":"2025","title":"Raw files from DSG hydrophone collected from the West Bay Marine Reserve in Pamlico Sound, NC during 2011 (Larval settlement soundscapes project)","authors":"David B. 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Eggleston"},"performedAtOrganization":{"_id":"47","name":"North Carolina State University - Marine, Earth and Atmospheric Sciences"}},{"role":{"_id":"140","name":"Co-Principal Investigator"},"performedBy":{"_id":"615885","name":"DelWayne Bohnenstiehl"},"performedAtOrganization":{"_id":"47","name":"North Carolina State University - Marine, Earth and Atmospheric Sciences"}},{"role":{"_id":"128","name":"Student"},"performedBy":{"_id":"628822","name":"Ashlee Lillis"},"performedAtOrganization":{"_id":"47","name":"North Carolina State University - Marine, Earth and Atmospheric Sciences"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"50396","name":"Nancy Copley"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"51498","name":"Shannon Rauch"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[{"_id":"628736","name":"West_Bay_Marine_Reserve","synonyms":[],"dates":{"start":"2011-06-18T00:00:00.000Z","end":"2012-07-06T00:00:00.000Z"},"platform":{"_id":"628735","name":"NC_State"},"chiefScientists":[]}],"funding":[{"_id":"615881","name":"OCE-1234688","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1234688"}],"instruments":[{"_id":"628728","name":"","description":"DSG acoustic recorder (Loggerhead Instruments, Sarasota, FL, USA)","type_id":"628727","type_name":"Acoustic Recorder","type_desc":"An acoustic recorder senses and records acoustic signals from the environment.","type_acronym":""},{"_id":"628717","name":"","description":"HTI-96 hydrophone with a sensitivity of -185.8 dBV/μPa and flat frequency response between ~0.1 and 30 kHz (High-Tech Inc., Gulfport Mississippi)","type_id":"628716","type_name":"Hydrophone","type_desc":"A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change.","type_acronym":""}],"parameters":[{"_id":"628775","name":"deployment","format":"","frictionlessType":"integer","description":"

deployment number

","units":{"_id":"","name":"unitless"},"type":{"_id":"1729","name":"dataset_id","description":"

dataset_id: a unique combination of alpha and/or numeric characters designating a dataset (filename in many cases)

"}},{"_id":"628776","name":"lat","format":"","frictionlessType":"number","description":"

latitude; north is postive

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"730","name":"latitude","description":"

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

"}},{"_id":"628777","name":"lon","format":"","frictionlessType":"number","description":"

longitude; east is postive

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"731","name":"longitude","description":"

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datsets as degrees, minutes

"}},{"_id":"628778","name":"year","format":"","frictionlessType":"integer","description":"

year

","units":{"_id":"","name":"unitless"},"type":{"_id":"1062","name":"year","description":"

year, reported as YYYY, e.g. 1995

"}},{"_id":"628779","name":"month_start","format":"","frictionlessType":"integer","description":"

month at start of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"892","name":"month_start","description":"

month at start of measurement period, use in conjunction with month_end and only when the duration of sampling is a critical element to the measurement.

"}},{"_id":"628780","name":"day_start","format":"","frictionlessType":"integer","description":"

day at start of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"801","name":"day_start","description":"

day at beginning of measurement period, use in conjuction with day_end and only when the duration of sampling is a critical element to the measurement.

"}},{"_id":"628781","name":"time_start","format":"","frictionlessType":"time","description":"

time at start of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"1009","name":"time_start","description":"

starting time of observation, GMT time, 24 hour clock

"}},{"_id":"628782","name":"ISO_DateTime_Local_start","format":"%Y-%m-%dT%H:%M:%S","frictionlessType":"datetime","description":"

start Date/Time (Local); EDT, -4 hours offset from UTC. ISO formatted based on ISO 8601:2004(E); format: YYYY-MM-DDTHH:MM:SS (local time)

","units":{"_id":"","name":"unitless"},"type":{"_id":"1909","name":"ISO_DateTime_Local","description":"

Date/Time (Local) ISO formatted
\nThis standard is based on ISO 8601:2004(E) and takes on any of the following forms:
\nYYYY-MM-DDTHH:MM:SS[.xx]
\n2009-08-30T09:05:00[.xx] (local time)
\n2009-08-30T14:05:00[.xx]Z (UTC time)
\n2009-08-30T14:05:00[.xx]-05:00
\nThe dashes and the colons can be dropped.
\nThe T can also be dropped \"by mutual agreement\", but one needs the trailing Z if the time is UTC.

Note the Time Zone (TZ) as +/-HH:MM
\nTime Zone signage is for conversion from local to UTC
\nWest Coast USA in summer is +7 (add 7 hrs to local time for UTC)

"}},{"_id":"628783","name":"month_end","format":"","frictionlessType":"integer","description":"

month at end of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"893","name":"month_end","description":"

month at end of measurement period, see month_start.

"}},{"_id":"628784","name":"day_end","format":"","frictionlessType":"integer","description":"

day at end of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"802","name":"day_end","description":"

day at ending of measurement period, see day_begin.

"}},{"_id":"628785","name":"time_end","format":"","frictionlessType":"time","description":"

time at end of study

","units":{"_id":"","name":"unitless"},"type":{"_id":"1003","name":"time_end","description":"

ending time of observation, GMT time , 24 hour clock

"}},{"_id":"628786","name":"ISO_DateTime_Local_end","format":"%Y-%m-%dT%H:%M:%S","frictionlessType":"datetime","description":"

end Date/Time (Local); EDT, -4 hours offset from UTC. ISO formatted based on ISO 8601:2004(E); format: YYYY-MM-DDTHH:MM:SS (local time)

","units":{"_id":"","name":"unitless"},"type":{"_id":"1909","name":"ISO_DateTime_Local","description":"

Note the Time Zone (TZ) as +/-HH:MM
\nTime Zone signage is for conversion from local to UTC
\nWest Coast USA in summer is +7 (add 7 hrs to local time for UTC)

"}},{"_id":"628787","name":"duration_days","format":"","frictionlessType":"integer","description":"

duration of deployment

","units":{"_id":"","name":"days"},"type":{"_id":"555754","name":"duration","description":"

Duration of treatment, observation or sampling

"}},{"_id":"628788","name":"record_interval","format":"","frictionlessType":"integer","description":"

recording interval

","units":{"_id":"","name":"minutes"},"type":{"_id":"1073","name":"no_bcodmo_term","description":"

An association with a community-wide standard parameter has not yet been made.

"}},{"_id":"628789","name":"record_duration","format":"","frictionlessType":"integer","description":"

recording durations

","units":{"_id":"","name":"seconds"},"type":{"_id":"555754","name":"duration","description":"

Duration of treatment, observation or sampling

"}},{"_id":"628790","name":"hydrophone_calib","format":"","frictionlessType":"number","description":"

hydrophone calibration

","units":{"_id":"","name":"dB V/uPa"},"type":{"_id":"1073","name":"no_bcodmo_term","description":"

An association with a community-wide standard parameter has not yet been made.

"}},{"_id":"628791","name":"DSG_gain","format":"","frictionlessType":"integer","description":"

hydrophone gain

","units":{"_id":"","name":"dB"},"type":{"_id":"1073","name":"no_bcodmo_term","description":"

An association with a community-wide standard parameter has not yet been made.

"}},{"_id":"628792","name":"first_file","format":"","frictionlessType":"string","description":"

name of first file in the deployment

","units":{"_id":"","name":"unitless"},"type":{"_id":"659543","name":"file_name","description":"

File name

"}},{"_id":"628793","name":"last_file","format":"","frictionlessType":"string","description":"

name of last file in the deployment

","units":{"_id":"","name":"unitless"},"type":{"_id":"659543","name":"file_name","description":"

File name

"}},{"_id":"628794","name":"file_size_GB","format":"","frictionlessType":"number","description":"

size of the zipped file

","units":{"_id":"","name":"GigaBytes"},"type":{"_id":"659544","name":"file_size","description":"

Size of file. Maybe in MB, GB, TB, etc.

"}},{"_id":"628795","name":"file_name","format":"","frictionlessType":"string","description":"

Name of the .zip file

","units":{"_id":"","name":"unitless"},"type":{"_id":"659543","name":"file_name","description":"

File name

"}}],"related_publications":[{"id":"920373","citation":"Bohnenstiehl, D. R., Lillis, A., & Eggleston, D. B. (2016). The Curious Acoustic Behavior of Estuarine Snapping Shrimp: Temporal Patterns of Snapping Shrimp Sound in Sub-Tidal Oyster Reef Habitat. PLOS ONE, 11(1), e0143691. https://doi.org/10.1371/journal.pone.0143691\r\n","relation_type":["Results"],"relation_desc":""}],"related_datasets":[],"services":[{"grouping":"","items":[{"name":"View Data","description":"An in-browser view of the primary tabular data file","url":"https://www.bco-dmo.org/dataset/628710/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"ERDDAP","items":[{"name":"SUBSET DATA","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.html","contentType":"text/html","actionType":"tool"},{"name":"VIEW TABLE","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.htmlTable","contentType":"text/html","actionType":"view"},{"name":"CSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.csv","contentType":"text/csv","actionType":"download"},{"name":"TSV","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.tsv","contentType":"text/tsv","actionType":"download"},{"name":"GeoJSON","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.geoJson","contentType":"application/geo+json","actionType":"download"},{"name":"MATLAB","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.mat","contentType":"text/x-matlab","actionType":"download"},{"name":"netCDF","description":"","url":"https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_628710_v2.nc","contentType":"application/x-netcdf","actionType":"download"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/628710/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/628710/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/628710/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[],"projects":[{"_id":"615882","name":"Can you hear me now? Estuarine soundscapes and their role in larval settlement","acronym":"Larval settlement soundscapes","description":"$1b"}],"archives":[{"id_value":"10.26008/1912/bco-dmo.628710.2","url":"https://doi.org/10.26008/1912/bco-dmo.628710.2","date_assigned":"2025-12-01","version_date":"2024-02-16","archiver":"Woods Hole Oceanographic Institution (WHOI BCO-DMO)","archiver_id":"191"}],"license":{"name":"Creative Commons Attribution 4.0","id":"CC-BY-4.0","uri":"https://creativecommons.org/licenses/by/4.0/","spdxUri":"https://spdx.org/licenses/CC-BY-4.0"},"metrics":{"views":{"count":1094},"downloads":{"count":1293}}}}]