Abstract: An alveolar structure of an acoustic damping panel which is configured for damping at least one sound wave of a sound frequency, wherein the alveolar structure comprises at least one attached element, separate from partitions, and configured for vibrating at a frequency substantially equal to the sound frequency of the sound wave to be damped. Also a method for producing such an alveolar structure, an acoustic damping panel comprising at least one such alveolar structure, and an aircraft comprising at least one such acoustic damping panel.

Abstract: An acoustic panel for an aircraft providing noise attenuation over a wide frequency band by combining two resonators, and acoustic panel manufacturing method. The acoustic panel includes a rear skin, a cellular structure, an intermediate layer including perforations, a cellular structure, a cellular structure and a resistive skin including perforations. The acoustic panel combines quarter-wave resonators with Helmholtz resonators to provide noise attenuation over a wide frequency range.

Abstract: An acoustic absorption structure including a cellular structure that includes at least one cell delimited by at least one wall and at least one partition system. The system includes at least one subsystem positioned in the cell and adapted to divide it into at least two cavities and at least one tongue connected to the subsystem and having a hook shape straddling one of the first and second edges of the wall. The tongue facilitates installing and retaining each partition system in the cell.

Abstract: An assembly jig for a cellular structure made from strips of material placed adjacent to each other and joined together so as to form first and second cells, opening on the first and second faces of the cellular structure, respectively. This assembly jig includes a housing delimited by a base and first and second side faces, configured for housing the strips of material of a cellular structure to be formed, superimposed on each other, a plurality of pins configured to be positioned between the superimposed strips of material in the first and/or second cells. An assembly device comprising the jig, and a method for manufacturing a cellular structure using the jig are also provided.

Abstract: An acoustic panel including first and second cellular structures, the first cellular structure including a set-back portion to form a recess dimensioned to accommodate the second cellular structure such that first faces of the first and second cellular structures, in contact with a first, acoustically resistive layer, are coplanar and that first edge faces of the first and second cellular structures are coplanar when the second edge face of the second cellular structure is in contact with the set-back portion. By virtue of the set-back portion, the first and second cellular structures are positioned correctly with respect to one another, thus contributing to an optimization of the acoustic treatment.

Abstract: An alveolar structure of an acoustic damping panel which is configured for damping at least one sound wave at a sound frequency, wherein the alveolar structure comprises at least one partition provided with at least one cavity configured such that the partition vibrates at a vibrational frequency substantially equal to the sound frequency of the sound wave to be damped. Also a method for producing such an alveolar structure, an acoustic damping panel comprising at least one such alveolar structure, and an aircraft comprising at least one such acoustic damping panel.

Abstract: An alveolar structure of an acoustic damping panel which is configured for damping at least one sound wave of a sound frequency, wherein the alveolar structure comprises at least one attached element, separate from partitions, and configured for vibrating at a frequency substantially equal to the sound frequency of the sound wave to be damped. Also a method for producing such an alveolar structure, an acoustic damping panel comprising at least one such alveolar structure, and an aircraft comprising at least one such acoustic damping panel.

Abstract: An acoustic panel for an aircraft providing noise attenuation over a wide frequency band by combining two resonators, and acoustic panel manufacturing method. The acoustic panel includes a rear skin, a cellular structure, an intermediate layer including perforations, a cellular structure, a cellular structure and a resistive skin including perforations. The acoustic panel combines quarter-wave resonators with Helmholtz resonators to provide noise attenuation over a wide frequency range.

Abstract: An acoustic panel including first and second cellular structures, the first cellular structure including a set-back portion to form a recess dimensioned to accommodate the second cellular structure such that first faces of the first and second cellular structures, in contact with a first, acoustically resistive layer, are coplanar and that first edge faces of the first and second cellular structures are coplanar when the second edge face of the second cellular structure is in contact with the set-back portion. By virtue of the set-back portion, the first and second cellular structures are positioned correctly with respect to one another, thus contributing to an optimization of the acoustic treatment.

Abstract: An assembly jig for a cellular structure made from strips of material placed adjacent to each other and joined together so as to form first and second cells, opening on the first and second faces of the cellular structure, respectively. This assembly jig includes a housing delimited by a base and first and second side faces, configured for housing the strips of material of a cellular structure to be formed, superimposed on each other, a plurality of pins configured to be positioned between the superimposed strips of material in the first and/or second cells. An assembly device comprising the jig, and a method for manufacturing a cellular structure using the jig are also provided.