Research results of the meteorological data influencing the accuracy of noise measurement results

摘要

Meteorological circumstances are significantly influencing the accuracy of traffic noise measurement data. Similarly to the authoritative traffic data, it seems necessary to introduce the concept of authoritative meteorological conditions and the actual measurement data need to be converted to it. Especially, this topic is important for the evaluation of measurement data of the current monitoring systems. The literature gives correction for measurements over 200 m primarily, but in most cases the noise measurement and its evaluation is performed within 200 m. Based on the data of long-term (24-hour) noise and corresponding meteorological measurements performed in the past, we established the relation between half-hour equivalent noise and meteorological parameters (temperature, humidity, etc.). We developed correlation with correction. We determined the critical distance, altitude, weather condition over which the data of the noise measurement give inaccurate results without correction. We set a function with the least squares method on the resulting sound pressure level-humidity-time functions. We assigned an equation to it - with the available statistical accuracy - which describes, inter alia, noise load - humidity relationship in mathematical form. We present the tests performed and its results, developed mathematical correlation, its applicability too. We analyze in detail the specific areas of application of the method developed and our suggestions for modernizing the noise measurement method. Meteorological circumstances are significantly influencing the accuracy of traffic noise measurement data. Similarly to the authoritative traffic data, it seems necessary to introduce the concept of authoritative meteorological conditions and the actual measurement data need to be converted to it. Especially, this topic is important for the evaluation of measurement data of the current monitoring systems.