2025_proceedings: Scattering and reflection from soft gassy sediments: Geoacoustic modeling approach

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  • Session: 15. Seabed Acoustics
    Organised by: Megan Ballard, Kevin Lee, Nick Chotiros
  • Lecture: Scattering and reflection from soft gassy sediments: Geoacoustic modeling approach [[invited]]
    Paper ID: 2290
    Author(s): Anatoliy Ivakin
    Presenter: Anatoliy Ivakin
    Abstract: Presence of even a small volume fraction of gas bubbles can significantly change acoustic properties of underwater sediments, particularly, their effective sound speed and attenuation. In this paper, a geoacoustic modeling approach which, after corrections in input parameters for gas content, is used for estimating the reflection loss and scattering strength, major characteristics describing geoacoustic bottom interactions. One of these corrections is discussed in more detail and shown to be significant in a strong volume scattering regime, which seems a reasonable assumption for gassy sediments with bubbles and voids or with stronger fluctuations of sound speed caused by spatially varying concentration of bubbles. Results of numerical simulations of angular dependences of reflection loss and backscattering strength for soft gassy sediments are presented.
      Download the full paper
  • Corresponding author: Dr Anatoliy Ivakin
    Affiliation: University of Washington
    Country: United States

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