2023_programme: Spatially averaged propagation factor formulations for underwater sound mapping

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  • Session: 21. Underwater Noise - Modelling and Measurements
    Organiser(s): Alexander Gavrilov
  • Lecture: Spatially averaged propagation factor formulations for underwater sound mapping
    Paper ID: 2042
    Author(s): Sertlek H.Ozkan, Ainslie Michael A., MacGillivray Alex O., Matthews Marie-Noel
    Presenter: Sertlek Ozkan
    Abstract: The sound maps are usually calculated for a receiver grid in various coordinate reference systems. To avoid any misleading representation of sound maps (e.g., due to spatial aliasing, interpolation errors), the propagation factor or squared sound pressures should be averaged within the receiver grid cells. However, spatial averaging over receiver cells, which requires propagation loss calculations between many source and receiver pairs, is computationally expensive. This work introduces an alternative analytical approach to calculating spatially averaged propagation loss without point-to-point calculations. The energy flux formulas for calculating the propagation factor are modified to obtain a formulation for the “point-to-area” calculation over radial cells in polar coordinates, which directly gives the spatial average of the propagation factor. The proposed results are compared with the arithmetic average of the propagation factor over the radial cells in polar coordinates. The analytical formulation of a spatially averaged propagation factor provides a practical approach for sound mapping simulations without requiring large computational efforts.
  • Corresponding author: Dr Ozkan Sertlek
    Affiliation: Jasco Applied Sciences
    Country: Netherlands
    e-mail:

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