Deepest Part of the Ocean, the Mariana Trench, Proves to Be Hauntingly Noisy
Deepest Part of the Ocean, the Mariana Trench, Proves to Be Hauntingly Noisy
By Alyssa Newcomb
·Mar 4, 2016, 1:37 PM ET
The deepest part of the ocean -- the Mariana Trench -- is proving to be eerily noisy.
Scientists recorded ambient noise for three weeks from a hydrophone placed 36,000 feet below the ocean surface in the Challenger Deep trough in the Mariana Trench near Micronesia. What they discovered was the deepest part of the ocean is not a place of peace and solitude but instead has a cacophony of sounds.
"You would think that the deepest part of the ocean would be one of the quietest places on Earth," Robert Dziak, a research oceanographer with the National Oceanic and Atmospheric Administration, said in a statement this week.
"Yet there is almost constant noise," he added. "The ambient sound field is dominated by the sound of earthquakes, both near and far, as well as distinct moans of baleen whales, and the clamor of a category 4 typhoon that just happened to pass overhead."
http://abcnews.go.com/Technology/deepest-part-ocean-mariana-trench-proves-hauntingly-noisy/story?id=37399544
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For the first time we have lowered a microphone into the Challenger Deep, the deepest known ocean trench. It picked up some surprising noises
By Colin Barras
4 March 2016
When film director James Cameron visited the deepest known point on Earth in 2012, he did not see a great deal. But if he had taken some underwater microphones with him he might have heard a lot.
For the first time, scientists have obtained audio recordings from 7 miles (11km) below sea level in Challenger Deep, the deepest part of the Mariana Trench, south-west of Guam. They reveal a soundscape rich with the rumble of earthquakes, the deep moans of whales – and the mechanical whirr of ships.
The recordings were made by researchers from the National Oceanic and Atmospheric Administration, Oregon State University and the US Coast Guard as part of an effort to measure the amount of sound pollution in the Pacific Ocean.
You can listen to some of the recordings below.
More:
http://www.bbc.com/earth/story/20160304-hear-the-first-audio-recordings-from-the-oceans-deepest-point
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