Although STC and SRC suggest how perfectly noise passes by way of unique components, NRC (Noise Reduction Coefficient) measures how well elements cease sound from reflecting (simply how much sound they're able to absorb). The NRC is The proportion of sound that a area absorbs (Basically, hits a surface area https://soundinsulation12110.bluxeblog.com/64275898/examine-this-report-on-urban-noise-solutions