Abstract

The Detection of Envelope Modulation on Noise (DEMON) method is widely used to detect the propeller cavitation noise signals of naval surface ships. In the DEMON method, the accuracy of analysis strongly tends to rely on the user skill and experiences because noise signals must be investigated visually and qualitatively. This study suggests a quantitative indicator that detects the cavitation noise signal to improve the accuracy of signal analysis. The cross entropy concept of information theory was applied to derive the quantified indicator.

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