Basement listening room, designed to reduce HVAC and other mechanical noise and finished in late 2014. Dimensions approx. 20.5 ft x 12.5 ft x 7 ft. I'm still working to perfect the acoustic treatment, which as of Nov 2017 differs a little from what's shown here. A few months after taking the photos, we found and fixed construction defects causing moisture problems. Repair included replacing the cork floor with synthetic carpet and pad.