Measurement and modelling of probability density function in coastal range

The results reported in this paper are directed toward the development of a statistical model of ambient noise at shallow water in coastal range. The data sets of ambient noise are analyzed for frequency band below 150 Hz, where distant shipping and wind-generated noises are observed in underwater environment. For three classes of sea state the PDFs of data sets have been modeled using the Gaussian - Gaussian mixture model. The method of moments MS been applied for calculation of parameters of this model. The data sets were tested for randomness, independence and homogeneity. The estimated PDFs of ambient noise are nearly Gaussian. For 1-2 B sea stale the PDF can be modeled as the Gaussian - Gaussian mixture.