US 12,337,984 B2
Acoustic panel comprising at least two cellular structures which are nested one inside the other, aircraft having at least one such acoustic panel
Manuel Teigne, Toulouse (FR); Florian Ravise, Toulouse (FR); and Laurent Caliman, Toulouse (FR)
Assigned to Airbus Operations SAS, Toulouse (FR)
Filed by Airbus Operations SAS, Toulouse (FR)
Filed on Mar. 28, 2023, as Appl. No. 18/191,185.
Claims priority of application No. 2202974 (FR), filed on Apr. 1, 2022.
Prior Publication US 2023/0312121 A1, Oct. 5, 2023
Int. Cl. B64D 33/02 (2006.01); B64D 33/04 (2006.01); G10K 11/172 (2006.01)
CPC B64D 33/02 (2013.01) [B64D 33/06 (2013.01); G10K 11/172 (2013.01); B64D 2033/0206 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An acoustic panel comprising
a first longitudinal edge,
a first, acoustically resistive layer,
a second, reflective layer,
at least first and second cellular structures interposed between the first and second layers, and
at least a third, acoustically resistive layer interposed between the first and second cellular structures,
the first, acoustically resistive layer and the second, reflective layer being contiguous at the first longitudinal edge,
the first cellular structure having a first face, a second face that is opposite to the first face and that is in contact with the second, reflective layer, and a first edge face oriented toward the first longitudinal edge of the acoustic panel,
the second cellular structure comprising a first face in contact with the first, acoustically resistive layer and a second face opposite to the first face, and also first and second edge faces connecting the first and second faces,
the first edge face of the second cellular structure being oriented toward the first longitudinal edge of the acoustic panel;
wherein the first cellular structure comprises a set-back portion which extends from the first face in a direction of the second face and which forms a recess dimensioned to accommodate the second cellular structure and the third, acoustically resistive layer, the second cellular structure being positioned in the recess such that the first faces of the first and second cellular structures are coplanar and in contact with the first, acoustically resistive layer, that the first edge faces of the first and second cellular structures are coplanar, and that the second edge face of the second cellular structure is in contact with the set-back portion.