The city of Curitiba is divided into urban zones, each of them with a particular
noise emission limit according to the municipal law number 8583 from 1995, which
legislates about urban noise and public comfort [23]. The allowable limits for each
zone in particular can be observed in Table 1.
In the present survey the measurements were carried out during the afternoon in
1000 locations spread through all zones listed in Table 1. This means that the city
has been divided at the rate of one location for each 1500 inhabitants. The distribution
of the measurement sites per zone can be seen in Table 2. A non-regular
grid was used to distributed the measurement points throughout the city, (Table 2).
The bias effect, the proximity to roads an to building facades were avoided. Fig. 1
shows the distribution of the measured points spread through the city of Curitiba.