Value of atmospheric absorption coefficient α at temperature t=20 °C and frequency 1000 Hz is approximately 0.005 25 and [28]. However, this coefficient value α depends on environment temperature and acoustic noise frequency.
Theoretically estimated noise level depending on the distance to WT at different absorption coefficient values indicates that the impact of atmospheric absorption coefficient α to WT evoked noise level more intensively is revealed at a greater distance from the power plant (Fig. 1). Besides, it is necessary to evaluate the fact that in any traditional environment, other noise sources prevail as well, the impact of which should be estimated.