Dependence of sound absorption of a hall upon the shape of slits in the resonant suspended ceiling

Abstract

The hall has resonant suspended ceiling with large cross-and rectangularly-shaped slits. The aggregate area of the cross-shaped slits acounts for 34.5% and that of the rectangularly-shaped slits - for 19.5% of the total ceiling area. The maximum values of absorption coefficients are noted at 200 and 250 Hz. [...].