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Article

Acoustic Characteristics of Small Research Vessels

Australian Institute of Marine Science, Perth, WA 6009, Australia
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J. Mar. Sci. Eng. 2020, 8(12), 970; https://doi.org/10.3390/jmse8120970
Received: 20 October 2020 / Revised: 19 November 2020 / Accepted: 19 November 2020 / Published: 27 November 2020
(This article belongs to the Special Issue Ocean Noise: From Science to Management)
Vessel noise is an acute and chronic stressor of a wide variety of marine fauna. Understanding, modelling and mitigating the impacts of this pollutant requires quantification of acoustic signatures for various vessel classes for input into propagation models and at present there is a paucity of such data for small vessels (<25 m). Our study provides this information for three small vessels (<6 m length and 30, 90 and 180 hp engines). The closest point of approach was recorded at various ranges across a flat, ≈10 m deep sandy lagoon, for multiple passes at multiple speeds (≈5, 10, 20, 30 km h−1) by each vessel at Lizard Island, Great Barrier Reef, Australia. Radiated noise levels (RNLs) and environment-affected source levels (ASLs) determined by linear regression were estimated for each vessel and speed. From the slowest to fastest speeds, median RNLs ranged between 153.4 and 166.1 dB re 1 µPa m, whereas ASLs ranged from 146.7 to 160.0 dB re 1 µPa m. One-third octave band-level RNLs are provided for each vessel–speed scenario, together with their interpolated received levels with range. Our study provides data on source spectra of small vessels to assist in understanding and modelling of acoustic exposure experienced by marine fauna. View Full-Text
Keywords: vessel noise; radiated noise levels; monopole source levels; propagation loss vessel noise; radiated noise levels; monopole source levels; propagation loss
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MDPI and ACS Style

Parsons, M.; Meekan, M. Acoustic Characteristics of Small Research Vessels. J. Mar. Sci. Eng. 2020, 8, 970. https://doi.org/10.3390/jmse8120970

AMA Style

Parsons M, Meekan M. Acoustic Characteristics of Small Research Vessels. Journal of Marine Science and Engineering. 2020; 8(12):970. https://doi.org/10.3390/jmse8120970

Chicago/Turabian Style

Parsons, Miles, and Mark Meekan. 2020. "Acoustic Characteristics of Small Research Vessels" Journal of Marine Science and Engineering 8, no. 12: 970. https://doi.org/10.3390/jmse8120970

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