Compatible with most track systems, SoundElite is customizable window treatment which can reduce overall noise levels in interior space where windows and interior glazed surfaces would normally restrict introduction of absorptive materials. With 80% absorption at 500, 1,000, and 2,000 Hz articulate speech frequencies in closed position, vertical blind absorbs 35% of incident sound at these frequencies in open position. It is suited for retrofitting as well as new installations.