TERMIUM Plus^®

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Called surface ship torpedo defence(SSTD), the system includes highly sensitive acoustic sensors, which are towed some distance behind a ship and can identify and pin-point the location of an incoming torpedo.  2, fiche 1, Anglais, - surface%20ship%20torpedo%20defence

Fiche 1,  Justifications,  Français

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Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 CONT

The transducers may transmit one or more sonar signals …, e. g. [, ] sonar beams, into a body of water … with an emitting transducer … or similar device. When the sound waves, of the sonar beams, strike anything of differing acoustic impedance(e. g., the sea floor or something suspended in the water above the bottom), the sound waves reflect off that object … These echoes(or sonar returns …) may strike the emitting transducer element and/or a separate one or more sonar receiver elements, which convert the echoes back into an electrical signal which is processed by a processor … and sent to a display … mounted in the cabin or other convenient location in the watercraft.  2, fiche 2, Anglais, - transmitting%20transducer

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Radio acoustic ranging... was a method for determining a ship's precise location at sea by detonating an explosive charge underwater near the ship, detecting the arrival of the underwater sound waves at remote locations, and radioing the time of arrival of the sound waves at the remote stations to the ship, allowing the ship's crew to true range multilateration to determine the ship's position.  4, fiche 3, Anglais, - radio%20acoustic%20ranging

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Generally, several motors, termed thrusters, are located on the hull or hulls of the structure and are actuated by a sensing system. The sensing system may make use of radio, radar, or acoustic sensors, which feed signals to a computer. The computer then directs the thrusters to maintain the rig on location.  2, fiche 4, Anglais, - thruster

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Thrusters are labeled as such because it is their purpose to produce thrust in given conditions of current speed and submergence. Thrusters, in general, include all types of devices that can produce thrust.  3, fiche 4, Anglais, - thruster

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Dynamic stationing is the technology of maintaining a vessel’s position by means of thrust.  4, fiche 4, Anglais, - thruster

Fiche 4,  Justifications,  Français

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Hélice placée dans un tunnel permettant de maintenir, à la verticale du puits, un navire de forage à positionnement dynamique.  2, fiche 4, Français, - propulseur

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Le principe de l'ancrage dynamique [...] consiste à maintenir un support flottant en station en opposant en permanence à la force de dérive résultant de l'action des éléments la réaction conjuguée de propulseurs contrôlés en intensité et en direction par un calculateur alimenté par les informations d'un dispositif détecteur d'écart.  3, fiche 4, Français, - propulseur

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The primary challenge in acoustic modeling is computation of reverberation paths from a sound’s source position to a listener’s receiving position. As sound may travel from source to receiver via a multitude of reflection, transmission, and diffraction paths, accurate simulation is extremely compute intensive.  2, fiche 5, Anglais, - acoustic%20modeling

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Computer-aided acoustic modeling tools are important for design and simulation of three dimensional environments. For instance, an architect might use such a tool to evaluate the acoustic properties of a proposed auditorium design. Or, a factory designer might be able to predict the sound levels of any machine at any position on a factory floor. Acoustic modeling can also be used to provide sound cues to aid understanding, navigation, and communication in interactive rates. For example, the voices of users sharing a virtual environment may be spatialized according to each user's avatar location.  2, fiche 5, Anglais, - acoustic%20modeling

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Utilisation du principe de l'échosondeur pour localiser des objets ou des engins situés sous l'eau et invisibles de la surface.  1, fiche 6, Français, - localisation%20acoustique

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Fiche 8,  Justifications,  Anglais

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(...) the acoustic dose-rate meter(...) gives an audible warning when the wearer is subjected to a high rate of irradiation. As the dose rate increases, the pitch of the sound rises. This variation of the signal within the radiation field not only calls attention to the danger but also permits location of the source.  1, fiche 8, Anglais, - acoustic%20dose%2Drate%20meter

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