Noise (regular noise) is an important environmental impact of wind turbines. A wind farm with a large power-generating capacity generally produces more noise than a smaller wind farm. The noise norms for wind farms are laid down in the Activities (Environmental Management) Decree.
Observance of the norms does not mean that no nuisance, sleep disturbance and other possible health impacts resulting from these can occur. Nuisance and sleep disturbance – possibly severe – can occur at levels below the norms, and at the norm there will still be 10% who suffer severe nuisance.
The swish and whoosh noises produced by wind turbines are experienced as particularly irritating. The actual noise level of wind turbines is modest by comparison with other sources of noise, such as traffic and industry.