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The European Environmental Noise Directive END requires harmonized prediction methods for the major environmental noise sources. Currently two potential candidates are discussed for the modelling of aircraft noise: the 3rd edition of ECAC Doc.29 was published in 2005 describing a recommended method for the prediction of aircraft noise around civil airports. The German AzB model published in 2008 was developed as a tool for the enforcement of the revised German Act for Protection against Aircraft Noise that came into force in 2007. This paper gives a comparative overview on both methods, the underlying acoustic and aircraft performance models and their usability for different fields of application. [ABSTRACT FROM AUTHOR]

The Work Group of European Notified bodies 2000/14/EC which was established in 2004, recognized the urgent necessity to provide support for a more uniform and coherent implementation of the 2000/14/EC Directive. In this respect, a Sub-Group was created, called Statistics-Sub-Group (SWG), with the main task of verifying the possibility of finding common rules for the assessment of the declared sound power levels. This paper presents the results of a survey carried out by this group among the European notified bodies, in order to collect information both on the statistical formulas currently used for the calculation of the expanded uncertainty K and on the activities that authorities are performing in the different Member States on market surveillance. [ABSTRACT FROM AUTHOR]