Amplitude modulation of underwater noise produced by seagoing vessels

Data obtained from the processing of records of underwater noise produced by seagoing vessels are used to refine the model of the noise amplitude modulation caused by the rotation of the propeller shaft and ship roll and pitch in a seaway. Specifically, the width of the frequency band of the modulation process, the value of the modulation coefficient, and the distribution of the magnitude and phase of the modulation coefficient over the carrier frequency spectrum are investigated.

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