Ocean ambient sound south of Bermuda and Panama Canal traffic
Comparisons of current and historic ocean ambient noise levels are rare, especially in the North Atlantic. Recent (2013-2014) monthly patterns in ocean ambient sound south of Bermuda were compared to those recorded at the same location in 1966. Additionally, trends in ocean traffic, in particular, P...
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ftcdlib:oai:escholarship.org:ark:/13030/qt23x345br 2024-01-07T09:45:10+01:00 Ocean ambient sound south of Bermuda and Panama Canal traffic Širović, Ana Hildebrand, John A McDonald, Mark A 2417 - 2423 2016-05-01 https://escholarship.org/uc/item/23x345br unknown eScholarship, University of California qt23x345br https://escholarship.org/uc/item/23x345br CC-BY The Journal of the Acoustical Society of America, vol 139, iss 5 Earth Sciences Oceanography Acoustics article 2016 ftcdlib 2023-12-11T19:07:42Z Comparisons of current and historic ocean ambient noise levels are rare, especially in the North Atlantic. Recent (2013-2014) monthly patterns in ocean ambient sound south of Bermuda were compared to those recorded at the same location in 1966. Additionally, trends in ocean traffic, in particular, Panama Canal traffic, over this time were also investigated. One year of ocean ambient noise measurements were collected in 1966 using cabled, omnidirectional hydrophones at the U.S. Navy Tudor Hill Laboratory in Bermuda, and repeat measurements were collected at the same location from June 2013-May 2014 using a High-frequency Acoustic Recording Package. Average monthly pressure spectrum levels at 44 Hz increased 2.8 ± 0.8 dB from 1966 to 2013, indicating an average increase of 0.6 dB/decade. This low level of increase may be due to topographic shielding at this site, limiting it to only southern exposure, and the limit in the number of ship transits through the Panama Canal, which did not change substantially during this time. The impending expansion of the Canal, which will enable the transit of larger ships at twice the current rate, is likely to lead to a substantial increase in ocean ambient sound at this location in the near future. Article in Journal/Newspaper North Atlantic University of California: eScholarship |
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Open Polar |
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University of California: eScholarship |
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language |
unknown |
topic |
Earth Sciences Oceanography Acoustics |
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Earth Sciences Oceanography Acoustics Širović, Ana Hildebrand, John A McDonald, Mark A Ocean ambient sound south of Bermuda and Panama Canal traffic |
topic_facet |
Earth Sciences Oceanography Acoustics |
description |
Comparisons of current and historic ocean ambient noise levels are rare, especially in the North Atlantic. Recent (2013-2014) monthly patterns in ocean ambient sound south of Bermuda were compared to those recorded at the same location in 1966. Additionally, trends in ocean traffic, in particular, Panama Canal traffic, over this time were also investigated. One year of ocean ambient noise measurements were collected in 1966 using cabled, omnidirectional hydrophones at the U.S. Navy Tudor Hill Laboratory in Bermuda, and repeat measurements were collected at the same location from June 2013-May 2014 using a High-frequency Acoustic Recording Package. Average monthly pressure spectrum levels at 44 Hz increased 2.8 ± 0.8 dB from 1966 to 2013, indicating an average increase of 0.6 dB/decade. This low level of increase may be due to topographic shielding at this site, limiting it to only southern exposure, and the limit in the number of ship transits through the Panama Canal, which did not change substantially during this time. The impending expansion of the Canal, which will enable the transit of larger ships at twice the current rate, is likely to lead to a substantial increase in ocean ambient sound at this location in the near future. |
format |
Article in Journal/Newspaper |
author |
Širović, Ana Hildebrand, John A McDonald, Mark A |
author_facet |
Širović, Ana Hildebrand, John A McDonald, Mark A |
author_sort |
Širović, Ana |
title |
Ocean ambient sound south of Bermuda and Panama Canal traffic |
title_short |
Ocean ambient sound south of Bermuda and Panama Canal traffic |
title_full |
Ocean ambient sound south of Bermuda and Panama Canal traffic |
title_fullStr |
Ocean ambient sound south of Bermuda and Panama Canal traffic |
title_full_unstemmed |
Ocean ambient sound south of Bermuda and Panama Canal traffic |
title_sort |
ocean ambient sound south of bermuda and panama canal traffic |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/23x345br |
op_coverage |
2417 - 2423 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
The Journal of the Acoustical Society of America, vol 139, iss 5 |
op_relation |
qt23x345br https://escholarship.org/uc/item/23x345br |
op_rights |
CC-BY |
_version_ |
1787426649756663808 |