A plantation window shutter comprises a frame and a plurality of shutter blades pivotably supported by the frame in a fan configuration. The detector pixels are assembled side by side such that the first armatures define a detector plane. A support body diverges in width along lateral boarders from the lower surface to an upper surface of width. The signals which are provided by the sound sensor after first filtering serve as control signals for the adaptive filtering. Rep_pol represents the surface area of the ligand forming uncomplimentary polar interactions with the receptor. A second rigid member is at least partially received within the central opening of the first rigid member.