Sustainability

Energy

Wind

Noise

The potential acoustic pollution caused by aerogenerators determines two types of noise: mechanical noise that comes from the generator and aerodynamic noise caused by the rotor blades.
With regard to noise, in terms of decibels, the humming of aerogenerators is far lower than town noise. The decibels that one can hear at three hundred metres from a wind farm are the same one would normally hear amidst traffic or near an industry. At the moment high-technology aerogenerators are very quiet. It was calculated that, at a distance of around 200 metres, the noise of rotation originated by rotor blades can be confused with wind noise that blows into the surrounding vegetation.