3. Results and discussion
The model was calibrated by checking if the sound levels generated by the model were consistent with those measured in the field. This comparison was made by adding receivers to the model, at the points where the measurements were taken. The maps were calibrated with the measurements, and the difference between the measured and simulated [Leq] was lower than the 4.6 dB(A) recommended by the WG-AEN
(2002) [31]. Table 1 describes the difference between the simulated [Leq] and the [Leq] measured at some of the 232 measuring points.