International harmonization of procedures for measuring and analyzing of vessel underwater radiated noise

Ainslie, Michael A.; Martin, Bruce; Trounce, Krista; Hannay, David; Eickmeier, Justin; Deveau, Terry J.; Lücke, Klaus; MacGillivray, Alexander O.; Nolet, Veronique; Borys, Pablo

doi:10.1016/j.marpolbul.2021.113124

Cited by 22 publications

(1 citation statement)

References 26 publications

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“…The deployment of hydrophonic arrays can be used to quantify levels of noise radiated at the source of nearby transiting ships [ 9 , 10 ]. Information gathered from recording missions can then be used to develop numerical/empirical models of the radiated source levels [ 11 , 12 , 13 , 14 ] which, in turn, are used to supply frequency-dependent source characterization in propagation loss models (e.g., [ 15 , 16 ]).…”

Section: Introductionmentioning

confidence: 99%

Low-to-Mid-Frequency Monopole Source Levels of Underwater Noise from Small Recreational Vessels in the St. Lawrence Estuary Beluga Critical Habitat

Lagrois

Kowalski

Sénécal

et al. 2023

Sensors

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Anthropogenic noise from navigation is a major contributor to the disturbance of the acoustic soundscape in underwater environments containing noise-sensitive life forms. While previous studies mostly developed protocols for the empirical determination of noise source levels associated with the world’s commercial fleet, this work explores the radiated noise emitted by small recreational vessels that thrive in many coastal waters, such as in the St. Lawrence Estuary beluga population’s summer habitat. Hydrophone-based measurements in the Saguenay River (QC, Canada) were carried out during the summers of 2021 and 2022. Shore-based observations identified 45 isolated transits of small, motorized vessels and were able to track their displacement during their passage near the hydrophone. Received noise levels at the hydrophone typically fell below the hearing audiogram of the endangered St. Lawrence Estuary beluga. Monopole source levels at low frequencies (0.1–≲2 kHz) held on average twice the acoustic power compared to their mid-frequency (≳2–30 kHz) counterparts. The speed over ground of recreational vessel showed a positive correlation with the back-propagated monopole source levels. Estimations of the mid-frequency noise levels based on low-frequency measurements should be used moderately.

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