Exposure to road traffic noise in Brasília, Brazil

• Autor(a) principal: Garavelli, Sérgio Luiz
• Data de Publicação: 2021
• Outros Autores: Maroja, Armando de Mendonça, Carvalho Júnior, Edson Benício de, Costa, Cleber Alves da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: PARC (Campinas)
• Texto Completo: https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8658514
• topic: Noise map; Annoyance; Road traffic; Noise polution; Public health; Mapa acústico; Incômodo; Transporte rodoviário; Poluição sonora; Saúde pública

Acoustic contamination is one of the main environmental problems in large urban centres generated by road traffic. Noise maps are important tools for noise management in these locations. The main objective is to present the results of the evaluation of the acoustic impact due to road traffic on the population of Brasília. The article also presents an alternative methodology for acquiring traffic data necessary for the elaboration of noise maps. The speed, flow and composition of traffic were obtained from data provided by electronic speed controllers, common in most cities and complemented with filming and acoustic measurements in situ. In the elaboration of the noise maps, environmental simulation software was used, and the recommendations of the European Community were followed. From the analysis of the maps, annoyance due to road traffic and the number of people subject to sleep disturbances were estimated. The results indicate that the proposed alternative methodology is adequate and can be used in other cities, reducing the high costs for preparing the maps. The results also show that despite the heavy traffic in the city, the percentage of people who are highly annoyed and subject to sleep disorders is relatively small. The hierarchical structure, the shape of the roads and the Superquadras model used in Brasília contribute to the improvement of the conditions of acoustic comfort. Therefore, results show a positive influence of urban design on the city's acoustic comfort conditions.