No noise is good noise. Milgard’s Quiet Line™ insulated windows give you the best in sound control performance*, energy efficiency and weather protection. Quiet Line™ windows let in 30% less noise than our other windows. Plus you get the same high quality vinyl compound and attention to detail that all Milgard windows are known for. Quiet Line windows are the perfect solution if you live near an airport, overlook a freeway, or face frequent environmental noise of any kind. *Note: Exterior noise can never be eliminated totally from an exterior environment. A sound audit may be necessary to assess the best means for reducing specific, single source noises.