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This lecture discusses the analysis of the effectiveness of road noise reduction measures at the source, focusing on the use of different road coverings such as porous and semi-density asphalt. It covers topics like the impact of road surface texture optimization, temperature sensors for acoustic quality assessment, and challenges in standardizing asphalt formulations. The lecture also presents data from measurement campaigns and data analysis, highlighting the noise reduction achieved by speed reduction and the influence of factors like rubber quality and N2 content. Conclusions emphasize the importance of considering various parameters for assessing the effectiveness of combined measures in reducing road noise.