Assessment of environmental noise from long-term window microphone measurements

Abstract

The experiment confirmed that the typical for Lithuanian climate seasonal traffic nose level variations (at winter time due to snow covering and impaired traffic conditions, at autumn due to wet road surface) must be taken into account applying short-term relatively to the annual determining L-DEN. When only representative whole-days (day selected to conform normal conditions under ISO 1996-2 standard requirement) measurements data are taken into account to assess annual value, the weekly (from 7 successive days) estimated L-DEN values gave a standard deviation of 0.9 dB and the one whole-day estimated L-DEN values gave the standard deviation of 1.3 dB.