World’s first THX-Certified soundproof door joins THX-Certified QuietRock SUNNYVALE, CA — September 2, 2008 — Serious Materials today announced its new line of QuietHome soundproof doors. These new ...

SUNNYVALE, Calif.--(BUSINESS WIRE)--Serious Materials today announced its new line of QuietHome soundproof doors. These new products provide market-leading noise reduction in an attractive, stainable ...