Archives of Acoustics, 31, 4(S), pp. 253-260, 2006

Uncertainty analysis in the assessment of long-term noise indicators

W. Batko
AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Department of Mechanics and Vibroacoustics, Al. Mickiewicza 30, 30-059 Kraków
Poland

R. Bal-Pyrcz
State Higher Vocational School in Krosno, Institute of Technology, Wyspiańskiego 20, 38-400 Krosno
Poland

This study addresses the assessment conditions of long-term noise indicators based on
irregular noise monitoring data. Variations of $L_{\textrm{ DEN}}$ estimates (day – evening – night noise
indicator) on different days of the week were examined. Two hypotheses are verified: that
mean estimates shall be identical on all days of the week and that variances of thus obtained
estimates are homogeneous. The data for statistical analyses were noise levels recorded in one
year by an on-line noise monitoring system in Kraków.
Keywords: environmental noise, acoustic monitoring, statistical analysis.
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