Averaging underwater noise levels for environmental assessment of shipping | Zendy

Nathan D. Merchant | Zendy; Philippe Blondel | Zendy; D. Tom Dakin | Zendy; John Dorocicz | Zendy

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Averaging underwater noise levels for environmental assessment of shipping

Author(s) -

Nathan D. Merchant,

Philippe Blondel,

D. Tom Dakin,

John Dorocicz

Publication year - 2012

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4754429

Subject(s) - underwater , environmental science , noise (video) , outlier , octave (electronics) , statistics , mode (computer interface) , cumulative effects , noise exposure , mathematics , acoustics , oceanography , computer science , geology , ecology , physics , medicine , hearing loss , artificial intelligence , audiology , image (mathematics) , biology , operating system

Rising underwater noise levels from shipping have raised concerns regarding chronic impacts to marine fauna. However, there is a lack of consensus over how to average local shipping noise levels for environmental impact assessment. This paper addresses this issue using 110 days of continuous data recorded in the Strait of Georgia, Canada. Probability densities of ~10(7) 1-s samples in selected 1/3 octave bands were approximately stationary across one-month subsamples. Median and mode levels varied with averaging time. Mean sound pressure levels averaged in linear space, though susceptible to strong bias from outliers, are most relevant to cumulative impact assessment metrics.

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