Acoustic foam, commonly referred to as sound absorbing foam or soundproof foam, is available in a variety of colors, patterns, thicknesses and NRC (noise reduction coefficient) ratings. Manufactured from a polyurethane or melamine foam core, they can be in the form of wall or ceiling panels, corner bass traps, ceiling tiles, ceiling clouds and hanging baffles. These products are used in home theaters, recording studios, broadcast studios, auditoriums, cinemas churches, classrooms and many other facilities to improve soundproofing via absorption or correct a noise problem.