ЕCOLOGICAL ASPECTS IN THE WIND ENERGY INDUSTRY
NOISE
Wind energy generators produce two types of noise:
- mechanical noise (noise from the work of different mechanical ñomponents)
- aerodinamical noise (noise from the interaction of the blades and the wind flow)
Source of noise |
Noise level , db. |
algetic upper level of the human ears. |
120 |
Jet engine turbine noise ,distance 250 m. |
105 |
Noise from a splin machine, distance 7 m. |
95 |
Lorry noise , at speed of 48 km/h;distance-100m. |
65 |
Office background noise. |
60 |
Automobile noise at 64km/h speed. |
55 |
Wind turbine noise at distance 350m. |
35-45 |
Background noise in village at night. |
20-40 |
Laws in the UK, Germany, Holland, Denmark, limit the noise level produced from a working wind turbine to 45db at day time and 35 at night.The minimum distnace between a generator and residential building is 300m.
