Design and modeling of a periodic single-phase sandwich panel for acoustic insulation applications

Sandwich and composite panels are widely adopted in acoustic applications due to their sound insulation properties that overcome mass-law-based partitions medium–high frequency regions. A key aspect the design procedure of is control resonance-dominated region transmission loss (STL) curve. Within range, such systems usually show weakness poor performances with respect standard single-layer solutions. In present contribution, we want highlight an innovative approach sandwich partition concept. novel single-phase panel realized by adopting a periodic repetition properly designed unit cell. The resulting internal truss structure self-sustained, its mechanical stiffness can be tuned maximize STL region. set parametric analyses reported how topology cell affects noise reduction panel. Experimental validation performed on nylon 3D-printed prototype. proposed then integrated some locally resonant elements further improve low-frequency solution. Industrial production considerations also taken into account during process make solution industrially valid circular economy focus.