Influence of regional climatic factors on acoustic calculations and on the choice of noise reduction measures

Considered the influence of regional climatic factors on noise attenuation on basis of calculation and analysis of data for 122 cities in Europe. It is shown that for the same noise source sound levels during the year can vary significantly. For different regions of Europe and octave band center frequencies, the change in noise attenuation during the year reaches several dozens of decibels. Analysis of the data for the octave band center frequency 1000 Hz plotted on the map of Europe shows that the largest change in attenuation due to atmospheric absorption during the year occurs on the North of Europe. As the octave band center frequency increases from 1 to 8 kHz, the maximum values shift westward toward Central Europe. But at the same time, for all octave band center frequencies, the minimum values of changes during the year will be observed in the West and North-West of Europe: on the territory of Portugal, Spain, Great Britain and Ireland. For example, for an octave band center frequency 8 kHz, noise attenuation varies from 27-55 dB/km in Western Europe to 86 dB/km in Eastern Europe during the year.