3D Beamforming (3D BF) is able to investigate the noise sources directly on the vehicle’s surface. In this way, the Sound Pressure Level (SPL) accuracy and the localization of the noise sources increase.
The survey of the 3D Geometry of the vehicle is preformed by an optical scanning system fully integrated in the Wind Tunnel.
The results plotted in figure under highlight the better accuracy of the 3D BF compare with the PBF. In fig. 5 is plotted an example of noise map achieved with the 3D BF.