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AssigneeAlenia Aermacchi S.p.A.
InventorsEmanuele Merlo, Pier Giorgio Ferrante, Diego Copiello, Gianni Duccini
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An element (26) for sound absorption is intended for being mounted on components of aircrafts, such as engine nacelles. The element includes a face-sheet (28), which is, at least in a region thereof, acoustically permeable, a substantially sound-reflective back-sheet (30) and a honeycomb layer (32), “sandwiched” between the face-sheet (28) and the back-sheet (30) and defining a mesh structure which has hollow cells (34, 34′) laterally neighboring one another. The cells (34, 34′) are adapted to make the sound waves that enter through the face-sheet (28) and are reflected by the back-sheet (30) resonate inside their side walls. The element (26) has a passage (36) that connects together a group of the cells (34, 34′), thereby causing the cells to acoustically cooperate with one another.
Element for sound absorption, for being mounted on components of aircrafts, said element comprising:
The element according to any one of the preceding claims, further comprising a dividing region positioned in the intermediate layer;
Dependencies are inferred from the claim text.