Rapid industrial development is depleting chemical energy and deepening global warming. The wind power plant is attracting attention as a nature-friendly renewable energy. However, due to the noise generated during the operation of the wind power plant, the complaints of nearby residents are still continuing. The noise of the wind power plant is characterized by very low low-frequency noise and impact noise, unlike ordinary living noise. However, there is no acceptance criterion for wind power plant noise. Only the general environmental noise standard is applied to wind power plant. In this paper, the characteristics of wind power plant noise are analyzed by considering the sound propagation pathways. Experimental results show that the noise level is reduced by 32dB from the measured position when the ordinary living noise propagates 800m. On the other hand, it is confirmed that the noise level is reduced by 32dB from the measured position when the wind power plant noise propagates at 2000m. In addition, the noise of the wind power plant propagated far away along with the impact noise of the low frequency components, and it was found that only the low frequency components were intensively remained so that the wind power plant noise was very uncomfortable.