What Does Ocean Sounds - Bald Head Island Vacations Mean?
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A common air gun survey will go off every 9 to 12 seconds. They go back and forth, backward and forward, over huge locations of the ocean, like mowing the yard and they do this for weeks and months at a time. This produces a pressure that basically creates bubbles that broaden and contract, creating a tremendous amount of acoustic energy, a lot of which goes downward and shows off of geological structures.
Sound given off from Heard Island in the southern Indian Ocean in a 1990s experiment was gotten as far as the northern and southern Atlantic and Pacific oceans. Learn More Here How loud are these air gun bursts? The sound is 6 or 7 orders of magnitude louder than the loudest ship noises.
I can hear the surges from studies off Ireland, I can hear them happening in Nova Scotia. So imagine that every 10 seconds there is a surge that is rattling grandma's china out of the cupboard and it is falling on the flooring. One summer, some years back there were between 20 and 30 studies going on at the same time in the North Atlantic.
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The energy from all these surges fills the oceans with sound. It becomes just one huge storm of sound. You have actually studied the effect of anthropogenic noise on whales. Why are they a special issue? On a good day, whales can barely see their tails 60 feet away in turbid waters.
Whales see the ocean through sound. So their mind's eye is their mind's ear. You are handling animals that are highly acoustically oriented. Their consciousness and sense of self is based on noise, not sight. Numerous whale feeding grounds and migratory routes take place along shallow shorelines, which are now a few of the noisiest, most greatly affected environments.
If whales can't hear from other whales that have found a truly good spot of food, they lose opportunities to feed. 'Whales were attempting to hide behind rocks to escape in a sound shadow when seismic studies were being carried out along the California coast.' Exist actual behavioral modifications that you have observed when whales are exposed to high levels of sound? In the beginning, their calling rate may go up a bit as you and I may do when we shout in a loud space in order to be heard.
