Ocean background noise at different frequencies, as measured by Wenz (1962). Sound levels are given in dB re 1 µPa2/Hz Source:http://stellwagen.noaa.gov/science/passive_acoustics.html
The Big Idea: Noisy Ocean - National Geographic Magazine
To read an article which discusses the fact that the noise made by humans is adversely affecting life which resides in the oceans of our planet, please click on the link above this sentence. To read a report about Ocean Noise which was created by the International Fund for Animal Welfare please click on the following link:
http://www.ifaw.org/Publications/Regional_Publications/UK/Ocean_Noise_Pubs/asset_upload_file469_48552.pdf
Note: You need a program on your computer which can read PDF files to access the above-mentioned-article.
From the article:
"Ocean noise pollution is also being linked with behavioural
changes that have been seen in marine animals around the
world, including the abandonment of preferred habitat,
alterations in surfacing and diving patterns and in the types,
timing and volume of calls. At least some cetaceans are
known to have changed their calls as they struggle to make
themselves heard. Ocean noise pollution may also be behind
incidences in which marine animals have abandoned vital
activities, such as feeding. It may even be causing fatalities:
high intensity military sonar is implicated in the deaths of
beaked whales and mass strandings of cetaceans around
the world."
Wow,it seems Humans have created even more problems in the Oceans of this planet for those life forms which live there!
Here is a video I found at Youtube discussing the problem of excessive noise in the Oceans of the World:
source:http://www.youtube.com/watch?v=PIY0L-vHfo8
Here are some websites which discuss this problem in greater detail than I can in this blog post:
http://see-the-sea.org/topics/pollution/noise/noise_pollution.htm
http://www.terranature.org/oceanNoise_Weilgart.htm
http://www.msnbc.msn.com/id/7003587/ns/technology_and_science-science/
http://www.sciencedaily.com/releases/2010/08/100803212015.htm
http://www.oceanlink.info/ocean_matters/noise.html
