Acoustic shutter assembly

An acoustic shutter assembly adapted to cover a window opening in a wall, including at least one window pane arranged in a frame having an inside adapted to be mounted on the wall and an outside adapted to face away from the wall, wherein at least one ventilation duct is arranged in the frame between an outer ventilation opening and an inner ventilation opening, wherein the ventilation duct extends between a first layer of sound absorbing material arranged at the inside of the frame and a second layer of sound absorbing material arranged at the outside of the frame, and wherein the first and second layers of sound absorbing material extend at least substantially in parallel with the window pane, wherein a plurality of elongate acoustic reflectors are arranged between the first and second layers of sound absorbing material, wherein each of the acoustic reflectors extends across the frame from a location proximate the outer ventilation opening to a location proximate the inner ventilation opening so that the ventilation duct is separated into a number of respective ventilation channels formed between and defined at least in part by the acoustic reflectors, and further wherein each ventilation channel changes direction at least once between the outer ventilation opening and the inner ventilation opening, thereby at least substantially blocking any linear path from the outer ventilation-opening to the inner ventilation opening.