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The sources of ship-radiated noise rhythms are analysed and the common types of rhythms aredemonstrated in this paper.The noise modulation envelope is treated as a pulsatory random pro-cess with the same shape,equal iterative period,random amplitude and the group structure.Var-ious types of modulation envelope power spectra are calculated.The theoretical results are in goodagreement with the erxperimental results.
The sources of ship-radiated noise rhythms are analysed and the common types of rhythms are demonstrated in this paper. The noise modulation envelope is treated as a pulsatory random pro-cess with the same shape, equal iterative period, random amplitude and the group structure. Var-ious types of modulation envelope power spectra are calculated. The theoretical results are in good agreement with the erxperimental results.