Conference_programme: 15: Noise mapping
Lecture: Differences in noise modelling in Slovenia
Author(s): Cenček Špela, Markun Alenka
Summary:
In past years, the differences of the results of noise modelling in scope of Environmental Impact Assessments for planned projects have been identified between laboratories in Slovenia. We hypotize that despite good input Georeferenced Data to set up acoustic model exists in Slovenia, there is no clear consensus on methods for predictive noise modelling for planned projects. We analysed input data, method and results of predictive noise models for two planned industrial projects, both were done independantly by two laboratories. We also analysed the data, methods and results of two interlaboratory collaborative noise models for two existing noise sources (railway and motorway). \nIn cases of predictive noise modelling the validations of acoustic models were performed by noise measurements of surrounding existing noise sources, but in varying durations. Different terrain configuration data were chosen to set up acoustic model. The acoustic characteristics of existing buildings were also not described identically. The planned noise sources were comparably described and digitized. Differences in noise modeling results between different laboratories have ranged up to 10 dBA, which cosiderably exceeds the acceptable uncertainty ranged between 3 to 6 dBA.\nContrary is cases of collaborative noise modelling for two existing noise sources the possibility to perform the validation noise measurements of existing noise sources greatly increased the comparability of noise modelling results. In both cases of collaborative noise modelling for existing motorway and railway the modelling results of different laboratories were comparable. Differences in noise modeling results between different laboratories were below 5 dBA, which was acceptable uncertainty set up by interlaboratory noise modelling organizer.\nThe lessons learned from the study were: 1) the noise measurements are important tool to minimise modelling errors and should be in cases of predictive noise modelling performed at least for validation of acoustic model; 2) National guidelines or manual should be made on the appropriate data, methods, noise source digitalisation, validation of accoustic model etc. in order to unify the predictive noise models and their results in scope of Environmental Impact Assessments for planned projects.\n
Corresponding author
Name: Ms Špela Cenček
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: Slovenia
