Thekutorwa kwenzwicoefficient NRC iri pamusoro pe0.5, iyo inogona kuwedzera basa rechivako, kuvandudza acoustic nharaunda yechivako, nekuvandudza hupenyu hwevanhu.Yakakodzera mapurojekiti ehunyanzvi akadai sezvivakwa zvehofisi, mahotera, zvipatara, mabhanga, matare, zvikoro uye mamwe masangano, mikoto yeruzhinji, masutu makuru, dzimba dzebhizinesi, wadhi, dzimba dzekuvhiya, matare edzimhosva uye mamwe mapurojekiti ehunyanzvi, pamwe nemakamuri ekugamuchira vanhu, mahofisi, makamuri emisangano nedzimwe nzvimbo dzinoyevedza.

Noise reduction coefficient NRC indekisi yekuongorora yakazara inoyera kugona kunyudzwa kweruzha rwechimwe chinhu munzvimbo yakavharwa.Iyo yakakwirira iyo NRC, iyo shoma iyo ruzha inoratidzwa kumashure kunzvimbo.Mukupesana, ruzha runogara ruchiratidzwa munzvimbo kuti iite reverberation, zvichikonzera kuneta kweruzha rwekumashure.Pamusana pekuona kwenzeve yevanhu, chete kana NRC inosvika 0.5 kana kupfuura, nzeve yemunhu inogona kunzwa kuderedzwa kukuru kweruzha.Ongororo dzakaratidza kuti miviri yakasanganiswa-inobata ruzha, yakadai semamineral wool panels anonzva inzwi, uye simbi dzesimbi dzine twumaturu twekumashure dzinotora ruzha dzine avhareji yekuita kwekunzwa.Inzwi-inotora mapaneru akadai seasina-porous gypsum board, calcium silicate board uye simbi bhodhi dzinenge dzisina kurira-kunwa mhedzisiro.Porous-absorbing panels senge perforated gypsum board haaite zvakanaka kune yakaderera-frequency ruzha.

Iyo yekudzikisa ruzha coefficient NRC yakakosha kune chero nzvimbo yakavharirwa.Iyo nguva yekudzokorodza uye huwandu hweruzha hunofanirwa kutariswa munzvimbo dzinotevera:

1. Hofisi yakavharwa, imba yekusangana
2. Yakavhurika / yakavharwa yakasanganiswa hofisi nzvimbo
3. Lobby, nzvimbo yebasa
4. Kirasi / nzvimbo yekudzidza, gymnasium, resitorendi
5. Nzvimbo yezvokurapa, yakadai se: imba yekugamuchira, imba yekubvunzurudza, hofisi yechiremba, nezvimwewo.
6. Nzvimbo yekutengesa, imwe nzvimbo yebasa revatengi, nezvimwewo.