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

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 sound reflection over a selection of seventeen noise barriers, tested both outdoors, using the new method, and in laboratory, following the EN 1793-1 standard. The Adrienne method has been found sensitive to the shape and the acoustic impedance of the barriers under test. The comparison between outdoor and laboratory results shows an acceptable correlation, while differences can be explained with the different sound fields and averaging techniques between the outdoor and laboratory tests. It is concluded that the Adrienne method is the most promising one for its intended use.