In the context of maritime surveillance or anti-submarine warfare, knowledge of the acoustic field radiated or diffracted by a device immersed in water is essential for its operational or tactical use, as well as for its design. Monitoring systems include active and passive sonar devices. A passive sonar system exploits the noise radiated by the vehicule (submersible vessel, surface ship, drone, etc.) it seeks to detect. These radiated noises are generated by existing onboard machinery, cavitation, hydrodynamic flows, impulsive and transient sources, etc.