Acoustic sound diffusion keeps sound waves from grouping, so there are no hot spots or nulls in a room. In fact, sound diffusion greatly widens the "sweet spot" and lends a strong, 3D sense of openness to a room, making it easier to hear "into" a mix. Diffusion obliterates standing waves and flutter echoes without simply removing acoustic energy from the space or greatly changing the frequency content of the sound. Some famous recording artists like to perform in strongly diffusive environments because of the openness they hear. Acoustic sound diffusion can make a small space seem large and a large space seem even larger.
Sound diffusion in a control room imparts the all-important Initial Time Delay (ITD) that keeps early reflections off room boundaries from getting to your ears too soon and smearing the direct sound you hear from your monitors. In conjunction with sound absorption, sound diffusion can effectively turn virtually any space into one that is appropriate and useful for the purpose of recording or monitoring sound with a high degree of accuracy.