Whilst STC and SRC indicate how perfectly noise passes by various supplies, NRC (Noise Reduction Coefficient) measures how nicely components stop sound from reflecting (the amount of sound they can take in). The NRC is the percentage of sound that a surface absorbs (Basically, hits a surface area and isn't https://augustrkarh.csublogs.com/38623430/how-quiet-living-can-save-you-time-stress-and-money