Nowadays, the interest on the acoustic noise emission level of vessels is increasing worldwide. In fact, the European Union (EU) promoted the Marine Strategy Framework Directive (MSFD) to monitor the Good Environmental Status (GES) of the EU seas.
The measurement of the underwater acoustic noise is expensive and usually is not feasible. For this reason, a method to estimate the underwater acoustic noise generated by a vessel from the measurement of the vibrations of the hull is proposed.
This method estimates the noise radiated from an adequate relation between the vibration of the hull and this radiated noise. In this paper, real measurements of the vibrations of a hull and the acoustic radiated noise are presented. Using signal processing methods, the relationship between the vibrations of the hull and radiated noise was computed. Finally, the goodness of the computed relation between the vibrations of the hull and radiated noise was performed by comparing real acoustic measurements and estimations. The measurements were performed using the Smart Digital Hydrophones (SDH) and Noise and Vibration Control System (CRV), both equipment, manufactured by SAES.
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