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Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
The boarded windows block the view of the ocean, but he can still hear the rumbling, followed by a few seconds of respite before another wave slams against the wall. ... Nor'easter sends enormous ...
Aside from sound produced by the acoustic source, the hydrophones record background noise caused by natural processes such as breaking of wind waves at the ocean surface. These other, unwanted sounds are often much louder than sound reflected from thermohaline boundaries. Use of signal-processing filters quietens unwanted sounds and increases ...
A Royal Caribbean cruise ship ran into high winds and rough seas in the Atlantic Ocean, forcing the Florida-bound vessel to retreat back to its home port in Cape Liberty, New Jersey.
Research on the origin of seismic noise [1] indicates that the low frequency part of the spectrum (below 1 Hz) is principally due to natural causes, chiefly ocean waves.In particular the globally observed peak between 0.1 and 0.3 Hz is clearly associated with the interaction of water waves of nearly equal frequencies but probating in opposing directions.
The storm was later identified as a Kona storm, which brings heavy rainfall and strong winds to Hawaii from the Southwest. A voice recorder in the cockpit recorded pilots saying after the ...
In February 2000, the British oceanographic research vessel RRS Discovery, operating in the Atlantic Ocean over the Rockall Trough west of Scotland, encountered the largest waves ever recorded by scientific instruments in the open ocean, with a significant wave height of 29.1 metres (95 ft) and individual waves up to 18.5 metres (61 ft). [40]
Scientists used an acoustic antenna: a group of underwater devices attached to the back of the ship that detect and record ocean sounds from all directions. The antenna allowed them to figure out ...