Although STC and SRC indicate how well noise passes through different materials, NRC (Noise Reduction Coefficient) actions how very well supplies stop sound from reflecting (how much sound they're able to absorb). The NRC is the percentage of sound that a surface absorbs (Quite simply, hits a surface area and https://glazing-options05791.isblog.net/rumored-buzz-on-urban-noise-solutions-49224915