Movable aerodynamic surface for an aircraft

A movable aerodynamic surface for an aircraft, comprising a skin extending in a span direction from an inboard end to an outboard end and extending in a chord direction from a leading edge to a trailing edge, wherein the skin includes a first skin portion and a second skin portion both extending from the leading edge to the trailing edge and together surrounding an interior from opposite sides, and

• a stiffener arrangement arranged in the interior for stiffening the first and second skin portions and including at least an inboard stiffener in the area of the inboard end and/or an outboard stiffener in the area of the outboard end,
• wherein at the inboard end between the first skin portion, the second skin portion and the inboard stiffener an inboard cavity is formed, and/or at the outboard end between the first skin portion, the second skin portion and the outboard stiffener an outboard cavity is formed,
• wherein an acoustic filler arrangement including multiple filler elements is arranged within the inboard cavity and/or the outboard cavity for reducing noise generated at the inboard cavity and/or at the outboard cavity,
• wherein the acoustic filler arrangement has a hybrid form including at least one first type filler element with a smooth outer surface and at least one second type filler element with a porous outer surface,
• wherein the inboard cavity and/or the outboard cavity further comprises two front cavities in the area of the leading edge, wherein the two front cavities are disposed on the opposite sides of a guide rail.