Experimental research of acoustic louver sound insulation

Abstract

Acoustic louver is a structural element that controls noise and at the same time enabling air ventilation of engineering equipment. Experimental research of acoustic louver is done in semi – anechoic chamber. This chamber used for testing sound insulation of various building constructions or passive sound reduction elements. The designed acoustic louver dimensions 1 m x 0,2 m x 1 m. Louver consists of seven, 3 mm-thick equally spaced at 120 mm, steel blades. When measuring angle of blades changed in 15 degree steps. From 0 to 45 degree. All louver blades are tilted in parallel. The results of Rw values of acoustic louver covered with different rockwool at different tilting angles differ from 4,2 to 9,8 dB. Results show that highest sound insulation is gained when acoustic louver tilted to 45 degree. The best sound insulation was gained with louver covered with foil-faced rockwool.