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hydroacoustic noise

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  • Delta class submarine — Delta IV class nuclear powered ballistic missile submarine. The Delta class (Project 667B) is a class of submarines which formed the backbone of the Soviet and Russian strategic submarine fleet since its introduction in 1973. They carry nuclear… …   Wikipedia

  • Alfa class submarine — The Soviet Union/Russian Navy Project 705 ( Лира / Lyra ) was a submarine class of hunter/killer nuclear powered vessels (abbreviated PLA: Podvodnaya lodka atomnaya , nuclear hunter/killer submarine). The class is also known by the NATO reporting …   Wikipedia

  • Digital scientific echosounder — is a type of scientific echosounder used in hydroacoustic research. In a digital scientific echosounder system, the returned acoustic signal is digitized for improved performance. Collected acoustic data is stamped with geographic information for …   Wikipedia

  • Acoustic quieting — This article primarily discusses mechanical and acoustic noise. See Noise reduction for electronic noise. : For noise masking by saturation, see Sound masking or pink noise.Acoustic quieting is the process of making machinery quieter by damping… …   Wikipedia

  • Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …   Wikipedia

  • November class submarine — Class overview Name: project 627 / 627A / 645 Builders: shipyard No. 402 in …   Wikipedia

  • USS Scorpion (SSN-589) — was a Skipjack class nuclear submarine of the United States Navy, and the sixth ship of the U.S. Navy to carry that name. Scorpion was declared lost on June 5, 1968,cite web |date=2007 |url = http://www.submarinehistory.com/Scorpion.html|title =… …   Wikipedia

  • Infrasound — is sound with a frequency too low to be heard by the human ear. The study of such sound waves is sometimes referred to as infrasonics, covering sounds beneath the lowest limits of human hearing (20 hertz) down to 0.001 hertz. This frequency range …   Wikipedia

  • Dynamic positioning — Offshore Support Vessel Toisa Perseus with, in the background, the fifth generation deepwater drillship Discoverer Enterprise, over the Thunder Horse Oil Field. Both are equipped with DP systems. Dynamic positioning (DP) is a computer controlled… …   Wikipedia

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