17 ACOUSTICAL WALL TREATMENTS-NAMELY, ACOUSTICAL WALL PANELS AND CUSTOM-MOLDED CONTOUR PANELS; ACOUSTICAL CEILING TREATMENTS-NAMELY, LAY-IN PANELS, MOLDED INSERTS AND DUCT TYPE TUBES, ACOUSTICAL BAFFLES, ACOUSTICAL DRUM ABSORBERS, AND ACOUSTICAL CEILING PANELS; ACOUSTICAL PANELS FOR FILING CABINETS; AND SUPPORT MEANS THEREFOR