530 - Techniques to measure the European LDEN noise indicator for major sources in complex urban environments
Paviotti M., Kephalopoulos S., Iacoponi A.
Abstract
The European Environmental Noise Directive 2002/49/EC introduces the concept of an “yearly averaged” noise indicator, one value for each relevant environmental source, for down to 50 dB of the each Lden caused by the specific source. Within the framework of the European IMAGINE project, techniques are under development to measure these long term values, either to check the validity of noise maps or to get input values to produce new ones. An environmental noise test measurement campaign was performed, to try several techniques to identify these Lden values within a complex urban environment. The selected site included four main sources: a major road, a major railway line, a major airport and a small industrial plant. Two main strategies, long and short term measurement, are presented and their main benefits and risks outlined. To compare these two, and to check the applicability of separation techniques that use the correlation between two microphones to obtain the Lden for each specific source are main object of this article. The short and long term measurements use a new meteorological classification to group the measured data under several propagating conditions, and allow to extend the Lden measurement to a whole year after averaging the propagation variation and not only the source variations, as it was mainly done in the past.
Citation
Paviotti M.; Kephalopoulos S.; Iacoponi A.: Techniques to measure the European LDEN noise indicator for major sources in complex urban environments, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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