Housing arrangement 8 for a drill rig, especially adapted for damping sound, said drill rig comprising a feed beam holder 3, a feed beam 4 being movably attached to the feed beam holder 3 and having a drill end 41 and a rear end 42, and a drilling machine 5 being movably attached to and movable along the feed beam 4, said housing arrangement 8 comprising a casing 7, and said feed beam 4. The invention is characterized in that the casing 7 is directly attachable to the feed beam 4, such that the casing 7 and at least a part of the feed beam 4 enclose the drilling machine 5, and allows for mutual movement between the feed beam 4 and the feed beam holder 3.