Dieffebi will participate as an exhibitor at the 2nd Symposium Office.Space.Acoustics. to be held on 19th and 20th October 2011 in Cologne. This second edition of the Symposium will present the latest developments in acoustic building design along with the latest innovations in acoustic products and solutions. Dieffebi will present Primo Acoustic, its new line of metal cabinets with sound-absorbing doors that reduce noise levels while furnishing workspaces in an elegant original manner.