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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.
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 water may be in the ocean, a lake, a river or a tank. Typical frequencies associated with underwater acoustics are between 10 ...
One lands on the ground, another pinches down on his ball, and the last one falls on Cub's head, providing a gruesome death for the poor baby. Lumpy shakes hands with Splendid for the help, and Splendid flies off, where Lumpy bids him farewell. Not long after his departure, Splendid hears a loud snap, forcing him to stop and look.
For most men, though, mercury consumption isn’t an issue. “Most healthy adults would need to consume a lot of higher-mercury fish over long periods of time to develop any symptoms of mercury ...
‘There’s magic, there’s mythology, there’s power to these rivers’: Inside the expeditions documenting the Congo Basin
Apple AirPods (2nd Generation) $80 $129 Save $49. This is an outrageous price for AirPods! In fact, it's a record-low price, so if you've been toying with a pair or need to replace your current ...
Noise control is an active or passive means of reducing sound emissions, often for personal comfort, environmental considerations, or legal compliance. Active noise control is sound reduction using a power source. Passive noise control is sound reduction by noise-isolating materials such as insulation, sound-absorbing tiles, or a muffler rather ...
Beat (acoustics) In acoustics, a beat is an interference pattern between two sounds of slightly different frequencies, perceived as a periodic variation in volume whose rate is the difference of the two frequencies. With tuning instruments that can produce sustained tones, beats can be readily recognized.