Alveolar structure of an acoustic damping panel comprising at least one partition configured for vibrating at a desired frequency, method for producing said alveolar structure

An alveolar structure of an acoustic damping panel which is configured for damping at least one sound wave of a given sound frequency, the alveolar structure extending between first and second surfaces, the alveolar structure comprising:

• a plurality of cells separated by partitions which each have a first edge at the first surface, a second edge at the second surface, and third and fourth edges connecting the first and second edges, each partition having a first face oriented towards a first cell, and a second face oriented towards a second cell,
• at least one partition provided with two rectangularly-shaped through cavities configured such that the at least one partition vibrates at a vibrational frequency substantially equal to the given sound frequency of the at least one sound wave to be damped, and
• wherein the two rectangularly-shaped through cavities are offset relative to one another in a direction parallel to the first and second edges, and wherein the two rectangularly-shaped through cavities are spaced apart and centered relative to the first and second edges and relative to the third and fourth edges.