Uncertainties in Long-Term Road Noise Monitoring including Meteorological Influences
The Noise measurements of road traffic noise at larger distances depend strongly on the meteorological propagation conditions, i.e. wind direction, wind speed and the atmospheric stability. For the HARMONOISE project long-term measurements on a highway for different distances ranging from 25 to 1200 m have been carried out, including the measurement of meteorological paramenters employing a 3D ultrasonic anemometer. These parameters covering the 3 dimensional wind speed, the wind direction, the vertical impulse flux as well as the Monin-Obuchev length to characterize the atmospheric stability. The measured data were analysed for different propagation paramenters/classes and the uncertainties for these classes were determined according to the guideline of uncertainties of measurements (GUM). The analysis covers the overall levels as well as frequency structure ( transfer function) in 1/3.octave bands. From the results requirements for measurements under various conditions were derived and the expected uncertainties are given.
KEPHALOPOULOS Stylianos;
KNAUSS Dieter;
BERENGIER Michel;
PAVIOTTI Marco;
2005-12-09
INCE Europe
JRC31596
https://publications.jrc.ec.europa.eu/repository/handle/JRC31596,
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