Masking tonal noise from a wind turbine
AssigneeVestas Wind Systems A/S
InventorMranal Gupta
Life of this patent
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Abstract
A method of masking tonal noise from a wind turbine. The wind turbine has a noise generator and a rotor-nacelle-assembly (RNA). The RNA comprises a nacelle and a rotor configured to rotate about a rotor axis with a horizontal projection. The method comprises: feeding a drive signal into the noise generator so that the noise generator emits directional masking noise, wherein the directional masking noise at least partially masks tonal noise from the wind turbine and points in a masking direction with a horizontal projection. The horizontal projection of the masking direction points away from the horizontal projection of the rotor axis.
Claims18
A method of masking tonal noise from a wind turbine, the wind turbine comprising a noise generator and a rotor-nacelle-assembly (RNA), the RNA comprising a nacelle and a rotor configured to rotate about a rotor axis with a horizontal projection, the method comprising:
- feeding a drive signal into the noise generator so that the noise generator emits directional masking noise, wherein the directional masking noise at least partially masks tonal noise from the wind turbine and points in a masking direction with a horizontal projection, and wherein the horizontal projection of the masking direction points away from the horizontal projection of the rotor axis.
A wind turbine, comprising:
- a noise generator;
- a control system;
- and
- a rotor-nacelle-assembly (RNA), wherein the RNA comprises a nacelle and a rotor configured to rotate about a rotor axis with a horizontal projection,
- wherein the control system is configured to feed a drive signal into the noise generator so that the noise generator emits directional masking noise which at least partially masks tonal noise from the wind turbine and points in a masking direction with a horizontal projection, and the horizontal projection of the masking direction points away from the horizontal projection of the rotor axis.
Dependencies are inferred from the claim text.