A standard impulse response captures how a room responds at a single point. A spatial room impulse response captures how it responds at multiple points simultaneously, preserving the spatial distribution of reflections. This is used for: immersive audio room correction (correcting a 7.1.4 Atmos system), spatial audio rendering (creating realistic virtual listening environments), and acoustic research.
SRIR measurement requires a microphone array (multiple capsules) or sequential measurements from different positions. Processing SRIR data allows separate correction of direct sound, early reflections, and late reverberation in each spatial direction.