Quiet Solution Residential soundproofing often requires special construction techniques, more materials, and expensive products. But Quiet Solution's Soundproofing System provides high sound transmission coefficient (STC) ratings while still allowing for standard construction. The Serenity soundproof drywall gypsum panel is the newest addition to the system. Measuring only 5/8 inch thick, the panels have been rated by independent labs at STCs from 52 to 72 using standard single-stud construction. The panels are installed like standard drywall panels. 800.797.8159. www.quietsolution.com.