Sound-attenuating composite component with honeycomb core and production method therefor

An acoustic insert body for a honeycomb for attenuating sound waves, comprising:

• the insert body having a main axis and being insertable into a honeycomb cell such that the main axis runs in a depth direction of the honeycomb cell, and
• the insert body comprising a cohesive surface, and, relative to the direction of the main axis, a first end and a second end,
• wherein the cohesive surface of the insert body has surface regions, spaced from one another in the direction of the main axis, which face one another and overlap in a projection onto a plane lying perpendicular to the main axis in order to demarcate a passage for sound waves between the surface regions in the direction of the main axis and to subdivide the honeycomb cell into a plurality of cavities which are demarcated in the direction of the main axis by the mutually facing surface regions.