Uwitekakwinjiza amajwicoefficient NRC iri hejuru ya 0.5, ishobora kuzamura imikorere yinyubako, kuzamura ibidukikije bya acoustic yinyubako, no kuzamura imibereho yabantu.Irakwiriye imishinga yumwuga nk'inyubako z'ibiro, amahoteri, ibitaro, amabanki, inkiko, amashuri n'ibindi bigo, koridoro rusange, amazu akomeye, inzu z'ubucuruzi, ibyumba, ibyumba bikoreramo, ibyumba by'urukiko n'indi mishinga y'umwuga, ndetse n'ibyumba byakira, biro, ibyumba by'inama n'ahandi hantu heza cyane.

Kugabanya urusaku coefficient NRC ni igipimo cyuzuye cyo gusuzuma gipima ubushobozi bwo kwinjiza amajwi yibikoresho runaka ahantu hafunze.Hejuru ya NRC, ijwi ntirishobora kugaragara kumwanya.Ibinyuranye, amajwi ahora agaragara mumwanya wo gukora reverberation, bikavamo urusaku rwimbere.Bitewe no kumva ugutwi kwabantu, gusa iyo NRC igeze kuri 0.5 cyangwa irenga, ugutwi kwabantu kurashobora kugabanuka cyane kwurusaku.Ibizamini byagaragaje ko imibiri ivanga amajwi avanze, nkibikoresho bikurura amajwi yubwoya bwubwoya bwintama, hamwe nicyuma cyuma gifata amajwi inyuma kigereranya imikorere ikurura amajwi.Ikibaho gikurura amajwi nkibibaho bita gypsum, ikibaho cya calcium silicate hamwe nicyuma cyicyuma ntigishobora gukurura amajwi.Amajwi akurura amajwi nkibibaho bya gypsumu bitobora ntibikora neza kumajwi make.

Coefficient yo kugabanya urusaku NRC ningirakamaro cyane kumwanya wose ufunze.Igihe cyo kwisubiraho nubunini bwurusaku bigomba kwitabwaho mubidukikije bikurikira:

1. Ibiro bifunze, icyumba cy'inama
2. Fungura / ufunze ibidukikije bivanze n'ibiro
3. Lobby, aho bakorera
4. Ibyumba by'ishuri / ibidukikije, siporo, resitora
5. Ibidukikije byubuvuzi, nka: inzu yakirirwamo, icyumba cy’ubujyanama, ibiro bya muganga, nibindi.
6. Ibidukikije bicururizwamo, ibindi bikorwa bya serivisi byabakiriya, nibindi.