N2 - Previous studies concerning the categorisation method have been based on short daytime measure- ments. These studies demonstrated urban-noise stratification in the daytime. Nevertheless, legislation and standards refer to noise estimation throughout the day. This paper presents the first attempt to apply the categorisation method to indicators obtained through long-term measurements. The study was conducted in Plasencia, Extremadura (Spain) which has approximately 41,500 inhabitants. First, we conducted a stratification of the roads using the categorisation method. Second, long-term measurements (approxi- mately one week) were conducted at different sampling locations across different categories of streets. The results were analysed by category. Moreover, the profile of the noise-level variation was analysed during the day. The results revealed a stratification of sound levels measured across the different categories. Furthermore, we found health risks due to the noise levels in this town. Short-term measurements were also conducted to complete the categorisation method suitability analysis. L1 - http://www.czasopisma.pan.pl/Content/101542/PDF/12_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/101542 PY - 2013 IS - No 3 EP - 405 DO - 10.2478/aoa-2013-0047 KW - noise pollution KW - sampling methods KW - street categorisation A1 - Gozalo, Guillermo Rey A1 - Barrigón Morillas, Juan Miguel A1 - Escobar, Valentín Gómez A1 - Vílchez-Gómez, Rosendo A1 - Méndez Sierra, Juan Antonio A1 - Francisco Javier Carmona del Río A1 - Gajardo, Carlos Prieto PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 38 DA - 2013 T1 - Study of the Categorisation Method Using Long-term Measurements SP - 397 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/101542 T2 - Archives of Acoustics