Abstract: A method for gait retraining of a runner includes: measuring acceleration data of at least one lower leg of the runner; diagnosing the acceleration data thereby determining a measure of the impact intensity of at least one external tibial shock; and providing real-time feedback to the runner by converting the measure of the impact intensity into distortion of music to a level which is perceived by the runner as a measure for the impact intensity. The conversion is done based on a predefined relationship between perceived distortion levels and imposed distortion levels, and the runner can reduce the distortion of the music by adjusting his or her gait.

Abstract: A rotor blade for a wind turbine is provided. The rotor blade includes a pressure side, a suction side, a leading edge section with a leading edge, and a trailing edge section with a trailing edge. An airflow flows along the surface of the rotor blade from the leading edge section to the trailing edge section and builds up a boundary layer in close proximity to the surface of the rotor blade. The rotor blade includes a noise reduction device for reducing noise which is generated by interaction of the airflow and the rotor blade. The noise reduction device is located within the boundary layer of the rotor blade. The noise reduction device includes a cover and connection device for connecting the cover to the surface of the rotor blade. The cover spans at least over a part of the surface of the rotor blade.

Abstract: A method for gait retraining of a runner includes: measuring acceleration data of at least one lower leg of the runner; diagnosing the acceleration data thereby determining a measure of the impact intensity of at least one external tibial shock; and providing real-time feedback to the runner by converting the measure of the impact intensity into distortion of music to a level which is perceived by the runner as a measure for the impact intensity. The conversion is done based on a predefined relationship between perceived distortion levels and imposed distortion levels, and the runner can reduce the distortion of the music by adjusting his or her gait.

Abstract: A rotor blade for a wind turbine is provided. The rotor blade includes a pressure side, a suction side, a leading edge section with a leading edge, and a trailing edge section with a trailing edge. An airflow flows along the surface of the rotor blade from the leading edge section to the trailing edge section and builds up a boundary layer in close proximity to the surface of the rotor blade. The rotor blade includes a noise reduction device for reducing noise which is generated by interaction of the airflow and the rotor blade. The noise reduction device is located within the boundary layer of the rotor blade. The noise reduction device includes a cover and connection device for connecting the cover to the surface of the rotor blade. The cover spans at least over a part of the surface of the rotor blade.

Abstract: A rotor blade of a wind turbine is provided. The rotor blade includes a pressure side, a suction side, a leading edge section, and a trailing edge section with a trailing edge. The rotor blade includes a noise reduction means with at least one aerodynamic device for manipulating an airflow flowing from the leading edge section to the trailing edge section. The airflow builds up a boundary layer with vortices adjacent to the surface of the rotor blade. The aerodynamic device is located at the trailing edge section of the rotor blade, and is arranged such that it is able to split up a vortex of the boundary layer into several smaller sub-vortices. Thus, noise that is generated by interaction of the airflow with the rotor blade may be reduced.