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Bispectral analysis of the noise of navigable objects
Miodrag S. Vračar
Passive hydroacoustic (HA) detection of navigable objects means a possibility of narrow band frequency separation of spectral components in the spectrum of hydroacoustic noise provoqued by various aggregates and processes during object moving in water. The most important role in noise generation have the main and auxiliary motors, the propeller, the pumps and other processes. In order to detect navigable objects, it is necessary to apply the techniques of the bispectral analysis of hydroacoustic signals generated in water as a result of moving of navigable objects. In this work the passing hydroacoustic characteristics of a navigable object are presented.
Key words: hydroacoustic detection, hydroacoustic noise of navigable objects, bispectrum, navigable object.
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