The test results show that the sound insulation of the air reaches 30--40db, which can ensure that residents within 50 meters on both sides of the expressway will not be disturbed by noise.
Natiijooyinka baaritaanka waxay muujinayaan in dahaarka codka ee hawadu uu gaarayo 30-40db, taas oo hubin karta in dadka degan 50 mitir labada dhinac ee wadada weyn aysan ku dhibin buuq, iyo magaalada hoose ee hareeraheeda ayaa sidoo kale xaqiijin kara xasilloonida gudaha iyo diirimaadka.