ТЕОРЕТИЧЕСКОЕ И ЭКСПЕРИМЕНТАЛЬНОЕ ИССЛЕДОВАНИЕ ЗВУКОВОГО ПОЛЯ БЕСПИЛОТНОГО ЛЕТАТЕЛЬНОГО АППАРАТА

In the paper we demonstrate the measurements of the structure of the sound field of the quadrocopter in the hover mode. The influence of the configuration of the outer region on the pattern of the vortex field is analyzed. Here are compared the results of theoretical and natural experiments. It is establishedthat in the open area the theoretical results nearly coincide with the measured ones. The results in a closed area differ by no more than 2 dB, which somewhat exceeds the generally accepted permissible error of 1 dB and can be explained by the nonideal physical conditions of the experiment (roughness of the ground surface, the influence of surrounding buildings, trees, etc.). The qualitative properties established should also become apparent in the conditions of UAV movement along the streets of the city with sound reflection from buildings. [ABSTRACT FROM AUTHOR]