Table 2 summarizes the results of the comparison of the mean
inside noise levels between both timeframes and their significance
level. Except for the number of noise events in the lower range
(30–40 dB(A)), results showed statistically significant differences
on all noise indicators, with elevated values in T.2307 compared
to timeframe T.TIB. For the number of noise events in the higher
noise range, we found that noise events were absent in more than
55% (T.2307) and 63% (T.TIB) of the nights and consequently no
further analysis was performed.