For those who are sensitive to noise, Japan-based Tokyo blinds have come up with Feltone blinds which can absorb sound waves and convert them into thermal energy through repeated reflection. By this, these blinds push down power noise by as much as 60%. Also, these are made from felt and require no modifications on windows or walls for installation. They look like just any other conventional blinds and takes just about 2 hours for installation. Also, these blinds have a cost-effective leverage for they come for 90% less price as that of soundproof panels.

As expected, these are just available for the Japanese folks and a 2mx2m blind costs $1,500. Check out the video here that gives you a better insight on these blinds.
[DigiInfo]