Return-air grill attenuator is designed for quick and easy installation into ceiling return-air grills in 2x2 suspended ceiling grid systems. It is used to acoustically treat open return-air grills for soundmasking uniformity by attenuating amount of sound that can pass directly through. It is sized for a standard 2’ x 2’ return-air ceiling grill. Its center perforation allows for attenuator’s steel planes to pitch upward and create deflective effect when an acoustical hot spot poses uniformity problem. When properly installed, the DS2022 will attenuate as much as 10 decibel (dB) of sound. It is also used to minimize cross-talk between adjacent closed offices or closed offices bordering open office areas.