Experimental verification of the european methodology for testing noise barriers in situ: airborne sound insulation

摘要

The European project Adrienne (1995-97) produced innovative methods for testing the intrinsic characteristics of noise barriers in situ. These methods are now under consideration at CEN to become European standards. This paper reports the verification of the Adrienne test method for airborne sound insulation over a selection of seventeen noise barriers, tested both outdoors, using the new method, and in laboratory, following the EN 1793-2 standard. The Adrienne method has been found sensitive to quality of mounting, seals and other details typical of outdoor installations. The comparison between outdoor and laboratory results shows an excellent correlation, while differences can be explained with the different sound fields and mounting conditions between the outdoor and laboratory tests. It is concluded that the Adrienne method is adequate for its intended use.