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underwater sound communication

См. также в других словарях:

  • Underwater acoustics — The field of underwater acoustics is closely related to a number of other fields of acoustic study, including sonar, transduction, acoustic signal processing, acoustical oceanography, bioacoustics, and physical acoustics.HistoryUnderwater sound… …   Wikipedia

  • Communication with submarines — is difficult because radio waves do not travel well through thick electrical conductors like salt water. The obvious solution is to surface and raise an antenna above the water, then use ordinary radio transmissions. Early submarines had to… …   Wikipedia

  • sound reception — Introduction       response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly …   Universalium

  • Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …   Wikipedia

  • National Underwater Reconnaissance Office — The National Underwater Reconnaissance Office (NURO) is the “hidden younger brother” of the National Reconnaissance Office (NRO). NRO was initiated in 1960 and developed as a common office for United States Air Force and the Central Intelligence… …   Wikipedia

  • Sirenia —   Sirenios …   Wikipedia Español

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

  • Anti-frogman techniques — are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.Risks and threats to be defended… …   Wikipedia

  • Insect — For the Breed 77 album, see Insects (album). Insect Temporal range: 396–0 Ma …   Wikipedia

  • Killer whale — Orca redirects here. For other uses, see Orca (disambiguation). Killer whale[1] …   Wikipedia

  • Carl Eckart — Carl Henry Eckart (May 4, 1902 in St. Louis, Missouri ndash; October 23, 1973 in La Jolla, California) was an American physicist, physical oceanographer, geophysicist, and administrator. He co developed the Wigner Eckart theorem and is also known …   Wikipedia

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