Recent advances in the theoretical & experimental analysis of naval unit hydroacoustic performance

The present paper reviews the experimental and theoretical techniques currently used at CNR-INSEAN for hydroacoustic applications. The theoretical procedure used for hydroacoustic analyses is based upon the Lighthill's acoustic analogy and concerns a hybrid hydrodynamic and hydroacoustic solver. Experimental hydroacoustics regards simultaneous velocity-pressure/visualization-pressure measurements and cross-correlation and conditional techniques. Furthermore, special signal processing techniques are used for the sake of removing unwanted noise contributions and separating the sound and pseudo-sound contributions. Examples of hydroacoustic analyses undertaken by aforementioned theoretical and experimental tools are documented in the paper.