Wind turbine generator noise

How noisy are wind turbines?

But some complaints have been made that they can cause too much noise for residents living within a mile of the blades. So just how noisy are these turbines? The closest that a wind turbine is typically placed to a home is 300 meters or more. At that distance, a turbine will have a sound pressure level of 43 decibels.

Does wind turbine noise affect sound level?

There is some evidence that, when wind turbine noise is propagating over water, there is a 3 dB decrease in sound level for each doubling of distance (cylindrical propagation) instead of the more usual 6 dB (spherical propagation) used for on-shore calculations . However, more work is needed to properly quantify this effect. 4.3. Uncertainty

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.

What is the noise mechanism of a wind turbine?

The noise mechanism is observed in surface pressure measurements near the TE , , of a wind turbine blade at the DTU test site. At a frequency over 2 kHz, wind turbine noise is normally at a rather low level except for two cases: mechanical noise and trailing edge blunt noise.

Should wind turbine noise be considered when designing a wind turbine?

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. Noise should be considered when designing any wind turbine, specifically low frequency noise related to RPM and airfoil selection.

What causes wind turbine noise at 10 m/s?

At a wind speed of 10 m/s, the wind turbine generated aerodynamic noise field is seen in Fig. 16. As shown in the figure, there is a high level of sound pressure generated at the rotor position. The propagation of wind turbine noise is influenced by the atmospheric turbulence as well as by the wake turbulence.