Tructural floor module with sound insulation properties

The module has a porous layer (2) covering a structural panel (3) comprising a set of cavities (10) with an opening (11) oriented towards the layer. The cavities are formed by association of plate with ribs arranged in the form of crosspiece. Two deformable components are placed between the plate and a deflector (5). The deflector has a u-shaped corner supported on a beam that separates the deformable components.