Panels, blankets, and smaller parts fabricated from fiberglass, open cell foam, and synthetic fiber used to absorb airborne noise at mid-range to higher frequencies. Septum or decoupler layers may be incorporated to address lower frequency problems. Open surfaces may be faced with materials for cosmetic appearance, durability, and clean-ability. The application side of the part may incorporate pressure sensitive adhesive for easy liner removal and installation. Parts of all sizes are commonly fabricated using die cutting, waterjet cutting, and lamination.