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J Acoust Soc Am. 2012 Sep;132(3):EL229-35. doi: 10.1121/1.4739251.

Radiated noise from commercial ships in the Gulf of Maine: implications for whale/vessel collisions.

Author information

1
Department of Mechanical Engineering, University of Maine, 219 Boardman Hall, Orono, Maine 04469, USA. jessica.k.allen@umit.maine.edu

Abstract

To understand mysticete acoustic-based detection of ships, radiated noise from high-speed craft, cruise ships, catamarans and fishing vessels was recorded June-September 2009. Calibrated acoustic data (<2500 Hz) from a vertical hydrophone array was combined with ship passage information. A cruise ship had the highest broadband source level, while a fishing vessel had the lowest. Ship noise radiated asymmetrically and varied with depth. Bow null-effect acoustic shadow zones were observed for all ship classes and were correlated with ship-length-to-draft-ratios. These shadow zones may reduce ship detection by near-surface mysticetes.

PMID:
22979837
DOI:
10.1121/1.4739251
[Indexed for MEDLINE]

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