Exploring Acoustic data

Millidecade bands computed from the acoustic data collected in the LifeWatch Broadband Acoustic Network. Frequency range from 0 to 24 kHz. Millidecade bands computed according to Miksis-Olds et al. (2021)¹

• Partners: Flanders Marine Institute (VLIZ), Ghent University
• Period: March 2021 - Ongoing
• Geographical coverage: ANE, Belgium, Belgian Coast, ANE, Belgium, Belgian Continental Shelf (BCS)
• Taxonomical coverage: Animalia WoRMS, 2023
• Moratorium: None
• Data quality: proof-of-concept

How to interpret this dataset

Query options

• frequency: Millidecade band (centre frequency)
• Timeframe: Starting and stopping date for the query.

Available columns

• frequency: Centre frequency of the millidecade band, in Hz
• upper_frequency: Upper frequency limit of the millidecade band, in Hz
• lower_frequency: Lower frequency limit of the millidecade band, in Hz
• value: Sound pressure density of the millidecade band
• datetime: ISO 8601 Date and Time in UTC, beginning of sample time bin
• Latitude: Center latitude in decimal degrees, WGS84.
• Longitude: Center longitude in decimal degrees, WGS84.
• station_name: Name or code of sampling station.
• hydrophone_depth: Depth in the water column, in (positive) meters
• etnID: Unique identifier for each deployment, linked to the metadata specified in the European Tracking Network (https://www.lifewatch.be/etn/)

Abstract

Hybrid millidecade bands computed from the acoustic data collected in the LifeWatch Broadband Acoustic Network. Hybrid millidecade bands computed according to Miksis-Olds et al. 2021 [1]. The output is given in power spectral density. The data were processed using pypam [2], in non-overlapping 1-minute windows. Each window is processed using a 1-second fft. Frequency range from 0 to 24 kHz. For data with a sampling rate higher than 48 kHz, a low pass Butterworth filter of order 4 was first applied to the raw data before computing the hybdrid millidecade bands.

[1] Miksis-Olds , J. L., Dugan, P. J., Martin, S. B., Klinck, H., Mellinger, D. K., Mann, D. A., Ponirakis, D. W., and Boebel, O. (2021). Ocean Sound Analysis Software for Making Ambient Noise Trends Accessible (MANTA). Frontiers in Marine Science, 8:703650. (doi: https://doi.org/10.3389/fmars.2021.703650) [2] Parcerisas, C. (2022). Lifewatch/pypam: Pypam, a package to process bioacoustic data. Zenodo.

How to cite these data

Parcerisas Clea, Dick Botteldooren, Paul Devos, Debusschere Elisabeth, Flanders Marine Institute (VLIZ); 2021; Broadband Acoustic Network dataset - Ambient Noise Trends in hybrid millidecade bands. https://www.vliz.be/en/imis?module=dataset&dasid=8172. Accessed through the LifeWatch Data Explorer / lwdataexplorer R package.

Availability: This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Please acknowledge as: This work makes use of the LifeWatch observation data and infrastructure (provided by VLIZ) funded by Research Foundation - Flanders (FWO) as part of the Belgian contribution to LifeWatch.

These data are also available in the R language with the lwdataxplorer package.

¹Miksis-Olds, J. L., Dugan, P. J., Martin, S. B., Klinck, H., Mellinger, D. K., Mann, D. A., Ponirakis, D. W., and Boebel, O. (2021). Ocean Sound Analysis Software for Making Ambient Noise Trends Accessible (MANTA). Frontiers in Marine Science, 8:703650. https://doi.org/10.3389/fmars.2021.703650