While STC and SRC show how very well noise passes through different components, NRC (Noise Reduction Coefficient) measures how effectively materials prevent sound from reflecting (exactly how much sound they will absorb). The NRC is The proportion of sound that a surface absorbs (To paraphrase, hits a surface and won't https://louisvxzzz.full-design.com/examine-this-report-on-soundproofing-74491008