Sound source localization is made very easy with acoustic cameras. Acoustic cameras are using Beamforming-methods for localization. The results are presented as a colored acoustic picture or acoustic movie and are easy to interpret for everybody. With this powerful acoustic tool it is possible to make acoustic optimization not just for sound design and NVH but also for failure diagnosis e.g. gear or leakage detection on engines. Futhermore the acoustic camera is an important tool for noise reduction e.g. machine covers or buildings.