Abstract

Acoustic signatures of shipping, weather and marine life are relatively well constrained, but there are strong variations with their oceanographic context and human activities. We investigate two contrasted settings, for timescales up to a year and frequencies up to 2 kHz. Arctic data from NOAA Noise Reference Station (NRS) NRS01, 500 m deep in the Arctic Chukchi Sea and away from major shipping areas is compared with measurements from Folger Deep, part of the Ocean Networks Canada network, 95 m deep and close to shipping lanes. PAMGuide is used to quantify broadband Sound Pressure Levels (SPLs), Third-Octave band Levels (TOLs), Power Spectral Densities (PSDs) and percentile contributions. The Acoustic Complexity Index (ACI) is an emerging metric to measure the apparent acoustic biodiversity, and we use its Seewave implementation. We compare the third-octave bands centred on 63 Hz and 125 Hz (“shipping” bands of the European Marine Strategy Framework Directive) in each environment and assess their use in the presence of heavy ice and little to no shipping. Metrics designed for open waters are not directly applicable to icy environments, or at least not on their own. They must be supplemented with multivariate analyses of context-specific third-octave bands.
Original languageEnglish
Title of host publicationInternational Conference on Underwater Acoustics, ICUA 2020
PublisherInstitute of Acoustics
ISBN (Electronic)9781906913373
DOIs
Publication statusE-pub ahead of print - 27 Oct 2020
Event2020 International Conference on Underwater Acoustics, ICUA 2020 - Virtual, Online
Duration: 9 Sep 2020 → …

Publication series

NameProceedings of the Institute of Acoustics
Volume40
ISSN (Print)1478-6095

Conference

Conference2020 International Conference on Underwater Acoustics, ICUA 2020
CityVirtual, Online
Period9/09/20 → …

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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