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Recreational boating traffic: A chronic source of anthropogenic noise in the Wilmington, North Carolina Intracoastal Waterway
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10.1121/1.2717766
/content/asa/journal/jasa/122/1/10.1121/1.2717766
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/1/10.1121/1.2717766

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Map of study area (image from Google Earth, ©2007 Europa Technologies, Image ©2007 New Hanover County, NC).

Image of FIG. 2.
FIG. 2.

Environmental daytime noise level profile for the Wilmington, North Carolina ICW (June–September 2001).

Image of FIG. 3.
FIG. 3.

Mean received sound pressure levels by hour of the day; standard error bars are shown for each data point.

Image of FIG. 4.
FIG. 4.

Mean received sound pressure level by day of the week; standard error bars are shown for each data point.

Image of FIG. 5.
FIG. 5.

Noise Index plot.

Image of FIG. 6.
FIG. 6.

Mean number of boats observed averaged per daytime hour; standard error bars are shown for each data point.

Image of FIG. 7.
FIG. 7.

Mean number of hourly boat totals observed, averaged per day of the week; standard error bars are shown for each data point.

Image of FIG. 8.
FIG. 8.

Percent occurrence of various vessel types and maximum received sound levels of each type.

Image of FIG. 9.
FIG. 9.

Total number of dolphins observed and expected on weekdays versus weekends (based on survey effort) in the Wilmington ICW between Masonboro Inlet and Carolina Beach Inlet from June 2001 to September 2001 (, ).

Image of FIG. 10.
FIG. 10.

Mean RLs for daytime and nighttime, , and Tursiops truncatus auditory threshold levels (extracted from Johnson (1967) as presented in Richardson et al. (1995).

Tables

Generic image for table
TABLE I.

Potential factors influencing received sound pressure levels in the Wilmington ICW (, , ).

Generic image for table
TABLE II.

Generating the Noise Index (all values rounded): (A) Regression results and weighting calculations; (B) eigenvector chart (prime values indicate weighted principal components).

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/content/asa/journal/jasa/122/1/10.1121/1.2717766
2007-07-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Recreational boating traffic: A chronic source of anthropogenic noise in the Wilmington, North Carolina Intracoastal Waterway
http://aip.metastore.ingenta.com/content/asa/journal/jasa/122/1/10.1121/1.2717766
10.1121/1.2717766
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