Vol.9, No 2, 2011 pp. 183 - 192
UDC 534.61
THE UNCERTAINTY SOURCES IN ENVIRONMENTAL NOISE MEASUREMENTS AND THE UNCERTAINTY ESTIMATION
Momir Praščević, Dragan Cvetković, Darko Mihajlov
University of Niš, Faculty of Occupational Safety of Niš, Čarnojevića 10a, Niš, Serbia
E-mail: momir.prascevic@znrfak.ni.ac.rs
Environmental noise very often occurs in the form of randomly fluctuating sound signals. Therefore, the measured value of Leq based on the sound pressure level measurements by sound level meter will probably differ from the true one due to the effects of the errors due to the experiment chain and the physical phenomenon in the sound propagation. Guidelines on estimating the uncertainty in environmental noise measurement compliance with the ISO Guide to Uncertainty in Measurements (GUM) and SRPS EN ISO 1996-2 will be given in this paper. Five main sources of uncertainty (measurement chain, operating conditions, meteorological conditions, receiver location and residual noise) are identified and their partial uncertainties are combined to determine the overall uncertainty in environmental noise measurement.
Key words: Environmental Noise, Measurement, Uncertainty
IZVORI NESIGURNOSTI PRI MERENJU BUKE U ŽIVOTNOJ SREDINI I OCENA NESIGURNOSTI
Buka u životnoj sredini se veoma često javlja u obliku slučajno promenljivih zvučnih signala. Stoga će se izmerena vrednost Leq, zasnovana na merenju nivoa zvučnog pritiska meračem nivoa zvuka, razlikovati od prave vrednosti zbog efekata grešaka koje se javljaju u samom mernom lancu i usled fizičkih fenomana koji prate prostiranje zvuka. U ovom radu biće date smernice za procenu nesigurnosti pri merenju buke u životnoj sredini u skladu sa ISO vodičem za mernu nesigurnost (GUM) i standardom SRPS EN ISO 1996-2. Identifikovano je pet izvora grešaka (merni lanac, radni uslovi, meteorološki uslovi, pozicija prijemnika i rezidualna buka) i njihove parcijalne nesigurnosti su kombinovane za određivanje ukupne nesigurnosti pri merenju buke u životnoj sredini.
Ključne reči: buka u životnoj sredini, merenje, nesigurnost