Even though STC and SRC indicate how properly noise passes via diverse supplies, NRC (Noise Reduction Coefficient) actions how perfectly components cease sound from reflecting (simply how much sound they can soak up). The NRC is the percentage of sound that a floor absorbs (in other words, hits a surface https://energyefficiency82319.aboutyoublog.com/34804191/examine-this-report-on-soundproofing