Patent ID: 8413922

Claim:
An acoustic treatment structure for a leading edge onto which an aerodynamic stream flows, from the outside to the inside, comprising: at least one acoustically resistive substructure ( 30 ), at least one alveolar substructure comprising strips ( 32 ) of cells, arranged in a direction that is essentially perpendicular to the direction of flow of the aerodynamic stream, and at least one reflective layer ( 34 ), wherein each strip ( 32 ) of cells comprises i) a first support part ( 36 ) with a U-shaped cross-section in the longitudinal direction, and an open surface that is opposite to the bottom of the U shape, the open surface flattened against the acoustically resistive substructure ( 30 ), the first support part ( 36 ) made in one piece that obtains boxes that are airtight relative to one another, the first support part ( 36 ) delimiting a space within the U shape and the acoustically resistive substructure ( 30 ), and ii) at least a second partitioning part ( 38 ) partitioning the space delimited by the support ( 36 ) and the acoustically resistive substructure ( 30 ) into cells, wherein each strip ( 32 ) of cells is displaced from an adjacent strip ( 32 ) of cells by a predetermined distance to form a plurality of flexibility regions on the acoustically resistive substructure ( 30 ) arranged longitudinally between the strips ( 32 ) of cells, wherein the acoustic treatment structure is constructed and arranged to conform to a shape of the leading edge by flexing along the flexibility regions of the acoustically resistive structure ( 30 ); wherein the two U-shaped branches of the support part ( 36 ) comprise—at their distal ends of the base—a flange ( 39 ) that offers a support surface that can be flattened against the acoustically resistive substructure ( 30 ).