Noise pollution in the city of Curitiba, Brazil

Abstract

A study carried out in 2000 in the city of Curitiba, Brazil, showed that the noise levels generated by the traffic have decreased when compared to the levels obtained in a similar survey conducted in 1992. Noise levels were measured in 350 points spread through the city considering the same criterium adopted in 1992. A study conducted by Maschkle showed that levels higher than 65 dB(A) are likely to cause health disturbances. The current survey showed that 80.6% out of the measured points presented noise levels over 65 dB(A), whereas in the previous survey 93.4% out of the measured points presented levels over that value. In spite of this, the 2000 levels are still too high considering the local legislation, putting the city in a high risk category to health impairments. Among the possible reasons that caused such a reduction on the noise levels some can be cited: better conditions of the new road vehicles circulating in the Brazilian cities and in Curitiba as well, installation of electronic speed controllers, and the establishment of speed limits for some urban streets and avenues.