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McMurdo Sound, Antarctica Weddell seal underwater in McMurdo Sound. The McMurdo Sound is a sound in Antarctica, known as the southernmost passable body of water in the world, located approximately 1,300 kilometres (810 mi) from the South Pole.
The American Submarine Signaling Company developed a hydrophone to detect underwater bells rung from lighthouses and lightships. [2] The case was a thick, hollow brass disc 35 centimetres (14 in) in diameter. On one face was a one-millimetre-thick (1 ⁄ 32 in) brass diaphragm, which was coupled by a short brass rod to a carbon microphone.
Output of a computer model of underwater acoustic propagation in a simplified ocean environment. A seafloor map produced by multibeam sonar. Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries.
It used an air gun that sent sound waves underwater to determine the underlying structure of the ocean floor and the submersible Alvin, which was used to find and recover a sample from the bedrock. [citation needed] Ballard was geologist diver in Alvin during Project FAMOUS, which explored the median rift valley of the Mid-Atlantic Ridge in ...
David Kwong (born 1980) [1] is a magician, puzzle creator, writer, and producer. [2] Kwong is known for creating illusions and puzzles for film and television and for functioning as a producer and consultant in the field. He produced Deception, ABC's action crime drama about a magician that joins the FBI. [3]
Underwater acoustic communication is a technique of sending and receiving messages in water. [1] There are several ways of employing such communication but the most common is by using hydrophones . Underwater communication is difficult due to factors such as multi-path propagation , time variations of the channel, small available bandwidth and ...
A fast-spreading wildfire that erupted this week northwest of Los Angeles roared from nothing to nearly 10,000 acres − in a matter of hours.
Trevor Graham Baylis CBE (13 May 1937 – 5 March 2018) was an English inventor best known for the wind-up radio.The radio, instead of relying on batteries or external electrical source, is powered by the user winding a crank.