Noise control products reduce equipment volume in loud environments by absorbing the sound or blocking it from spreading in specific directions. Acoustic wall blankets, screens, and curtains are hung from frames or ceilings and help dampen the spread of sounds. Acoustic wall panels attach to walls and other flat surfaces, dampen sound levels, and help reduce echoes. Acoustic ceiling tiles and baffles mount to compatible ceilings and dampen sounds. Sound-absorbing duct liners wrap around HVAC ductwork and dampen sound transmission. Mounting accessories for noise control products help users install sound-absorbing products. White noise machines continuously play white noise and other sounds to help mask unwanted sounds.