Interior sound source localization in closed cavities such as truck cabins, car interiors, aircraft cockpits or trains has been a challenge for many years because of the sound field complexity. LMS Test.Lab Interior Sound Source Localization provides a unique spherical beamforming solution for these highly complex interior sound source localization measurements. It features a spherical microphone antenna and includes the latest innovations to localize acoustic leaks, disturbing wind noise, and squeak and rattle. Next to that, a separate photo geometry scanner provides a quick and detailed interior geometry so that sound sources are propagated to their exact locations. For low-frequency sound sources down to 100Hz, the ESM method is used, yielding highly improved spatial resolution and dynamic range.