The owners of Visions Group, a supplier of technical production, power, signage and infrastructure to events, have acquired Dobson Sound Productions. Dobson Sound Productions is a London-based sound production company which was founded in 1989. It has worked with artists including Sir Elton John, Katy Perry, Damon Albarn and The Killers, as well as with venues including the Tate Modern, Tate Britain, V&A Museum and National ...