Via in situ measurements and sound mapping, this project aimed to investigate the environmental sound effect of road traffic noise on several roads in the northwest part of Curitiba. The following steps were taken to accomplish this: 1) defining the locations to be assessed, 2) gathering field data, 3) tabulating the data, 4) acoustic mapping, 5) evaluating past, current, and future scenarios, and 6) definitive assessment The aim of this research is to evaluate ambient noise on major thoroughfares that transport vehicles from one end of the city to the other. With a huge flow of vehicles and people, the roads pass through five large commercial and residential districts. 22 samples were taken in various locations to characterise the noise pollution in the evaluated stretches. Sound measurements were taken in accordance with the NBR 10151/2000 standard’s guidelines. The acoustic maps were created using the Predictor 8.11 sound analysis programme. A reference scenario was evaluated to reflect the current “acoustic panorama.” To assess noise in the chosen areas, three hypothetical and distinct scenarios were developed. In scenario 1, it was hypothesised that the number of vehicles will be decreased by half relative to the current situation. In scenario 2, it was hypothesised that the number of vehicles will be decreased by 75% relative to the current situation. Scenario 3 simulates noise in vulnerable areas over a 20-year period, assuming a 100% rise in the number of vehicles. The findings suggest that the acoustic characteristics of these stretches indicate the presence of ambient noise pollution. The situation with a 50% decrease in the number of vehicles shows that the steps taken were insufficient to reduce sound levels significantly. The scenario with a 75% reduction in vehicle flow demonstrates that the implemented measure will be significant in reducing sound levels within the legal limits. Furthermore, in the hypothetical case, it is possible to demonstrate that the flow will be highly saturated in 20 years, resulting in a substantial rise in sound levels and, as a result, an increase in ambient noise emissions. As a result, it is clear that taking only one control action is insufficient to solve the issue. To effectively combat noise, a medium and long-term strategy with many measures that work together is needed.

Author (s) Details

Paulo Henrique Trombetta Zannin
Laboratory of Environmental and Industrial Acoustics and Acoustic Comfort, Department of Mechanical Engineering, Federal University of Paraná, Curitiba, Brazil.

Patrícia Dias Soares Gottwald
Laboratory of Environmental and Industrial Acoustics and Acoustic Comfort, Department of Mechanical Engineering, Federal University of Paraná, Curitiba, Brazil.

Andrei Rei Rodrigues Silveira
Laboratory of Environmental and Industrial Acoustics and Acoustic Comfort, Department of Mechanical Engineering, Federal University of Paraná, Curitiba, Brazil.

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