There are many kinds of noise absorbing and soundproofing blankets - Residential Acoustics breaks down which ones will help keep the noise out.
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Using Soundproof Blankets to Reduce Noise - Residential Acoustics®
RYB HOME Large Soundproof Blanket, Thermal Insulated
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Soundproof Blankets & Outdoor Sound Barriers
(5) Grommets on both 54″ edges and mating Velcro on both vertical 96″ edges NRC: 0.75 STC: 33
PrivacyShield® ABBC-13EXT Exterior Barrier Backed Soundproofing Blanket
2 Pcs Large Soundproof Blanket Sound Dampening
Should I Use Acoustic Wall Blankets for Industrial Noise Control?
PrivacyShield® ABBC-13EXT Exterior Barrier Backed Soundproofing
Using Soundproof Blankets to Reduce Noise - Residential Acoustics®