title: Assessment of methods for simplified traffic noise mapping of small cities: Casework of the city of Valdivia, Chile.
abstract: In many countries such as Chile, there is scarce official information for generating accurate noise maps. Therefore, specific simplification methods are becoming a real need for the acoustic community in developing countries. Thus, the main purpose of this work was to evaluate and apply simplified methods to generate a cost-effective traffic noise map of a small city of Chile. The experimental design involved the simplification of the cartographic information on buildings by clustering the households within a block, and the classification of the vehicular traffic flows into categories to generate an inexpensive noise map. The streets have been classified according to the official road classification of the country. Segregation of vehicles from light, heavy and motorbikes is made to account for traffic flow. In addition, a number of road traffic noise models were compared with noise measurements and consequently the road traffic model RLS-90 was chosen to generate the noise map of the city using the Computer Aided Noise Abatement (CadnaA) software. It was observed a direct dependence between noise levels and traffic flow versus each category of street used. The methodology developed in this study appears to be convenient in developing countries to obtain accurate approximations to develop inexpensive traffic noise maps.
authors: Institute of Acoustics, Universidad Austral of Chile, PO Box 567, Valdivia, Chile.
authors: Nicolás A
authors: NA
authors: Bastián-Monarca
authors: Institute of Acoustics, Universidad Austral of Chile, PO Box 567, Valdivia, Chile.
authors: Enrique
authors: E
authors: Suárez
authors: Institute of Acoustics, Universidad Austral of Chile, PO Box 567, Valdivia, Chile. Electronic address: jparenas@uach.cl.
authors: Jorge P
authors: JP
authors: Arenas
keywords: Acoustic simulation; Environmental noise in cities; Simplified methods; Traffic noise modeling