Metal sheet with contour cut for vibration reduction

A metal sheet (2) comprising attachment points (4) configured to attach the metal sheet (2) to a support structure (12), the metal sheet (2) further comprising a contour cut (14) introduced in a sheet surface of the metal sheet (2), wherein the contour cut (14) extends transversely to a connection line (24) extending between a first and a second one of the attachment points (4), wherein the contour cut (14) that is positioned along the connection line (24) is located adjacent to the first attachment point (4) such that a vibration line that would extend as far as the first attachment point (4) if the contour cut (14) were not present is interrupted by the contour cut (14), wherein the contour cut (14) is arranged in an area of stress transition from the first attachment point (4) to the freely vibrating sheet, wherein the area of stress transition extends up to 16 mm away from the first attachment point (4).