Blackout Curtains for Bedroom 52 X 94 Inch Long Darkening Curtains/Drapes, Soundproof Thermal Grommet Window Curtains for Living Room(1 Panel) - Walmart.com
ODDLAUG Sound absorbing panel, gray - IKEA
Amazon.com: RYB HOME Soundproof Blackout Energy Effeciency 3-in-1 Curtain Set with Notoxic Detachable Liner for Home Office Theater Privacy Seperating Drapes, Navy Blue, W 52 x L 95 inches, 2 Pcs : Everything Else
IKEA's Sound-Absorbing Curtain Dampens Noise and Reverberations
Amazon.com: Deconovo Faux Linen Total Blackout Curtains with Back Liner (Grey, 52x63 in, 2 Panels) Soundproof Curtains, Thermal Insulation Drapes for Nursery, Full Light Blcoking Window Curtains for Living Room : Home
Hofa Acoustic Curtain Studio Std. – Thomann United States
Ikea's Sound-Absorbing Gunnlaug Curtains Will Reduce Echos