4.1.3.2. Consecutive noise monitoring in street canyon, urban square
and urban park. Simultaneous noise level monitoring was conducted
during four consecutive days in the winter (January 20e23,
2009) and during four consecutive days in the summer (June
27e30, 2010), a sequence of 192 data samples were collected at
each station. Results of the noise level monitoring at the investigation
sites showed a daily pattern with slight variation from day to
day and minor seasonal variation; the results presented here are
average noise level for four days for each season. Since the recorded
noise level at the two street canyons were similar, the following
section presents mean values for these two streets (Fig 4).
In both seasons, the highest mean noise level of 78 dB(A) was
recorded in the street canyon, while the lowest mean noise level
value of 66 dB(A) was recorded in the urban park, where a mean
noise level of 68 dB(A) was recorded in the urban square. It seems
that the differences between the mean noise level in the urban
square and in the urban park were small, but the minimum noise
values in the park were 4 dB(A) lower than those of the square, a
possible outcome of the vegetation