There are many kinds of noise absorbing and soundproofing blankets - Residential Acoustics breaks down which ones will help keep the noise out.
PrivacyShield® ABBC-13EXT Exterior Barrier Backed Soundproofing
How to Soundproof Your Apartment
Easy Ways to Soundproof Your Home - Residential Acoustics®
Soundproof with blankets – Acoustic Fields
Sound Blankets (Soundproofing and Acoustics) - Second Skin
Can Blanket Insulation Lower Noise Levels on Equipment?
Quiet Quilt™ Portable Soundproof Enclosure - Second Skin Audio
(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
Noise Reduction Curtain, Sound Deadening Blankets
PrivacyShield® ABBC-13 Barrier Backed Soundproofing Blanket