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A Rising Tide of Noise Is Now Easy to See

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Noise map, North Atlantic

Noise from tankers, cargo, and passenger ships in the North Atlantic; frequencies are in a 1/3-octave band centered on 400 Hz.

Credit: NOAA Underwater Sound Field Mapping Working Group; HLS Research; NCEAS

When a hurricane forced the Nautilus to dive in Jules Verne’s "Twenty Thousand Leagues Under the Sea," Captain Nemo took the submarine down to a depth of 25 fathoms, or 150 feet.

From The New York Times
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