Noise limit of wind turbine generator

How much noise can a wind turbine make?

39 dB(A) at a wind speed of 8 m/s. 37 dB(A) at a wind speed of 6 m/s. The total low-frequency noise from wind turbines must not exceed 20 dB at a wind speed of 8 m/s and 6 m/s indoors in dwellings in open countryside or indoors in areas with noise sensitive land use respectively. 2. NOISE AND LOW FREQUENCY NOISE FROM WIND TURBINES

What are the wind turbine sound limits?

Since the wind turbine sound levels are not corrected for background noise, the effective corrected wind turbine limits are 1 dBA lower. The New South Wales draft guidelines also set wind turbine sound limits of L Ceq of 65 dBC during the day and 60 dBC during the night.

How loud is a wind turbine at night?

Rural regions are very quiet in the evening and typically have a background noise level of 25 dB. Most evening threshold limits are 10-15 dB above this value making any wind turbine operating a night a potential annoyance (Harrison, 2009).

How do regulations affect wind turbine noise generation?

Regulations are important impacting possible site locations and, therefore, the growth of wind energy. Solving the issues associated with wind turbine noise generation will go a long way in promoting wind as one of the alternative energy generation technologies.

How much noise does a stall regulated wind turbine make?

For stall and active stall regulated wind turbines the low frequency part of the noise increases above 8 m/s but at a lower rate the noise in general. These conclusions are expected to be valid when no significant tones are present in the low frequency part of the spectrum.

Can wind turbine noise be reduced?

In order to meet noise regulations with a given wind turbine, it might be possible to reduce the rotational speed (Romero-Sanz and Matesanz, 2008). This is because the noise increases as the fifth power of the relative velocity to the blade. Unfortunately, a reduction is rotational speed translates to a reduction in power generated.