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School-reopening impact on traffic-induced noise level at different land uses: a case study
Monazzam, M. R.; Karimi, E.; Nassiri, P. & Taghavi, L.
Abstract
Reopening of schools is usually associated with
increased urban traffic and is likely to exacerbate traffic-induced
noise level in metropolitan cities. This study was
performed to investigate the role of reopening of schools
on noise level in one of the most crowded districts of
Tehran City. For this, two different noise criteria of
LAeq10min and SPL were measured during working days at
three occasions of morning, noon, and evening in summer
(school holiday season) and autumn (reopening season of
schools in Iran). According to the results, the average
equivalent sound pressure level was 72.3 dB(A) in summer
and 72.9 dB(A) in autumn. The P value of 0.44 obtained
from t test indicated that there is no significant difference
between the equivalent sound pressure level of the holiday
and reopening seasons in the district. Further, the value of
the indices Traffic Noise Index, Noise Impact Index, and
noise pollution level was constant within both seasons
studied. This may be due to the rigid surface of the passages
such as asphalt pavement, and high-rise buildings, as
well as the facade of buildings that can gradually overshadow
the role of school-induced traffic on noise pollution
in metropolitan cities.
Keywords
Equivalent sound pressure level; School reopening; Traffic noise; Land use
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