I-enclosure evalekile ngokuphelele engangeni msindo kanye nenjini enomsindo ophansi kunciphisa umsindo wokusebenza ube cisheAma-decibel angu-70, ukuqeda izikhalazo ngesikhathi sokwakha ebusuku, ukusebenza eduze kwezibhedlela, kanye nezindawo zokuhlala.
Ukucushwa okujwayelekile kufaka phakathiidrayivu yemvamisa eguquguqukayo engaphelinoma idrayivu yemvamisa eguquguqukayo ongayikhetha. Idrayivu ilungisa ngokuzenzakalelayo isivinini ngokusekelwe ekusetshenzisweni kwegesi, okuholelaukulahlekelwa okungenamthwalo okucishe kube yi-zero, ukonga amandla nokuqinisekisa umfutho wegesi ozinzile.