Grażyna Grelowska - Profil naukowy - MOST Wiedzy

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  • UNDERWATER NOISE GENERATED BY A SMALL SHIP IN THE SHALLOW SEA

    Study of the sea noise has been a subject of interest for years. The first work of this scope were published at the turn of the twentieth century by Knudsen (KNUDSEN et al., 1948) and G. Wenz (WENZ, 1962). Disturbances called "shipping noise" are one of the important components of the sea noise. In this work the results of an experimental research of underwater noise produced by a small ship of a classic propulsion are...

  • Shipping Low Frequency Noise and Its Propagation in Shallow Water

    One of the most significant factor influencing acoustical climate of the sea is underwater noise generated by moving ships. If the considered sea area has features of the shallow water, namely the wave frequency fulfils relation f < 10c/h, where c denotes phase speed of sound, and h is depths of the sea, then in certain distance from the wave source specific image of sound pressure distribution in the mean of wave modes appears....

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  • Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder

    The paper contains results of a in situ research main task of which was to detect objects buried, partially or completely, in the sea bottom. Object detecting technologies employing acoustic wave sources based on nonlinear interaction of elastic waves require application of parametric sound sources. Detection of objects buried in the sea bottom with the use of classic hydroacoustic devices such as the sidescan sonar or multibeam...

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Uzyskane stopnie/tytuły naukowe

  • 2002-06-28

    Nadanie stopnia naukowego

    dr hab. Oceanologia (Dziedzina nauk o Ziemi)
    Instytut Oceanologii PAN
  • 1990-07-11

    Nadanie stopnia naukowego

    dr Inne nauki inżynieryjne i techniczne (Dziedzina nauk technicznych)
    Wojskowa Akademia Techniczna

wyświetlono 865 razy