US Patent 7144216 Wind turbine with outer noise shell

For reduction of the noise radiation of a wind turbine with a tower (1) having an outside (8), a noise shell (4) is provided, which at least partially surrounds the outside (8) of the tower (1) and is positioned at a distance from the outside (8) of the tower (1). An air gap (24) remains between the tower wall (2) and the noise shell (4). The noise emitted from the tower wall (2) is absorbed by the noise shell (4). The noise shell can be composed of a waterproof outer layer (6) and a damping layer (10) directed towards the tower wall (2).