HOW MUCH YOU NEED TO EXPECT YOU'LL PAY FOR A GOOD NOISE POLLUTION

Although STC and SRC indicate how properly noise passes as a result of distinct supplies, NRC (Noise Reduction Coefficient) actions how properly products cease sound from reflecting (how much sound they will soak up). The NRC is The share of sound that a surface area absorbs (To put it differently, hits a surface and does not reflect again all over