Sensibilidade de parâmetros de um modelo de cálculo para a simulação do ambiente acústico urbano

Abstract

The applicability of the French model NMPB Routes 2008 for the simulation of the urban environmental noise in a Brazilian city is brought up in this paper, considering an analysis of the model sensitivity to the input parameters. For this purpose the calculation model is applied in an urban zone of the city of São Carlos - SP, by means of the software Cadna-A. The analysis compared field data and simulated data. Additionally simulations were processed, changing some input data configuration. The parameters verified with the sensitivity analysis were the meteorological conditions, the duration of the period of vehicular flow collection, the percentage of motorcycles in fields of light vehicles and heavy vehicles, the vehicular speed, the pavement type, the road declivity and direction of vehicular flow, the heights of the buildings and of receptors, the sound source type, and the quantity of sound sources per road. But for the meteorological conditions, the results proved that the model is sensible to the most part of the analyzed parameters. There is, however, an indication that some input fields could be adjusted to precisely fit to real data.