This article presents the results of measurements of environmental noise in respect to infrasounds. Infrasound sources whose levels depend on wind speed have been analyzed. The measurements were done for two common natural sources in the environment: forest noise and sea waves, and for an artificial (technical) source: wind turbines.
On the basis of results of measurements we have made an attempt of assessment of potential threat to people. Drawing conclusions from analyses it can be said that infrasound noise levels emitted by wind turbines do not reach levels causing threat to people; they can be compared to natural sources noise levels, common in environment.