Estudo dos mecanismos de geração de ruído de tráfego na interface pneu-pavimento

Abstract

Traffic noise is a problem that affects the society. However, they have to establish the triggers values for minimum standards of acoustic comfort to the people. The major factor to generate traffic noise is the tire/pavement interaction for speeds higher than 40 km/h. This work presents some evaluations of noise on the tire/pavement interface for different traffic speeds (40, 60 and 80 km/h), for several types of asphalt wearing courses applied in the State of Sergipe-Brazil (conventional asphalt mix and polymer-modified hot mix asphalt, slurry seal and double bituminous surface treatment). It was observed that the noise growth is proportional to the speed increase. The noise also varies with changing parameters such as voids, surface texture and roughness. It was proposed a prediction model to quantify the noise at the tire/pavement interaction from the speed and surface characteristics of asphalt wearing courses. The designers have now additional tools to indicate alternative pavements to critical urban roads, contributing to increase the society acoustic comfort, knowing as quit pavements.

Exposição de ciclistas ao ruído em uma cidade média brasileira

“…In Brazil, noise studies are usually conducted in large and medium-sized cities, based on noise maps of residential neighborhoods, city centers and commercial areas 2,[37][38][39][40] . Other studies compared the efficiency of different measurement times in fixed points 41 , focused on the noise resulting from the interaction between tires and pavement 42 , or analyzed, in nearby neighborhoods, the impact of noise produced at airports and lumber facilities, and by road traffic [43][44][45][46][47][48] . On the other hand, studies focusing on the sound landscape, which can be understood as the acoustic environment perceived and experienced by an individual in a particular context 49 , indicate that an intense noise level is not always a disturbance to the receptor.…”