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The SOFAR channel (short for sound fixing and ranging channel), or deep sound channel (DSC), [1] is a horizontal layer of water in the ocean at which depth the speed of sound is at its minimum. The SOFAR channel acts as a waveguide for sound, and low frequency sound waves within the channel may travel thousands of miles before dissipating.
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.
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.
The International Quiet Ocean Experiment (IQOE) is a global scientific research program aimed at improving understanding of the distributions of sounds in the ocean, and studying the effects of underwater noise pollution on marine life. The program has worked on promoting research, observations, and modelling to advance understanding of ocean ...
150 Ocean Names For Baby Boys And Girls. Whether you are seeking an ocean baby names for a boy or girl, here are 150 names to consider: Blue. Sandy. Teal. Marisol. Pania. Dorian. Sebastian ...
Research indicates that ambient noise from boats is doubling with each decade, [47] reducing the range at which whale sounds can be heard. Prior to the introduction large-scale shipping , whale sounds may have traveled from one side of an ocean to the other. [ 47 ]
The SOFAR channel acts as a waveguide for sound, and low frequency sound waves within the channel may travel thousands of miles before dissipating. [5] This phenomenon is an important factor in submarine warfare. The deep sound channel was discovered and described independently by Dr. Maurice Ewing, and Leonid Brekhovskikh in the 1940s. [6]
Atlantic white-sided dolphins jump and breach more frequently when in larger groups, as this behaviour might have a social context. [16] They have a wide vocal repertoire which includes squeals, whistles, clicks and buzzes. [17] [20] It is suggested that vocalisation is used for communication as noise production increases during socialising. [20]