Research

Averaging underwater noise levels for environmental assessment of shipping


Reference:

Merchant, N. D., Blondel, P., Dakin, D. T. and Dorocicz, J., 2012. Averaging underwater noise levels for environmental assessment of shipping. Journal of the Acoustical Society of America, 132 (4), EL343-EL349.

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    Official URL:

    http://dx.doi.org/10.1121/1.4754429

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    Abstract

    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. 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.

    Details

    Item Type Articles
    CreatorsMerchant, N. D., Blondel, P., Dakin, D. T. and Dorocicz, J.
    DOI10.1121/1.4754429
    Related URLs
    URLURL Type
    http://asadl.org/jasa/resource/1/jasman/v132/i4/pEL343_s1Publisher
    Uncontrolled Keywordsunderwater acoustics, ambient noise, shipping, environmental impact
    DepartmentsFaculty of Science > Physics
    Publisher StatementMerchant_etal_averaging_shipping_noise_levels_2012_JASA_EL.pdf: Copyright (2012) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Journal of the Acoustical Society of America 132(4) and may be found at (http://dx.doi.org/10.1121/1.4754429).
    RefereedYes
    StatusPublished
    ID Code31611

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