Fraunhofer Institute for Nondestructive Testing IZFP 
Development of acoustic characterization methods for the non-destructive characterization of metamaterials, characterization of different states of specimens using acoustic resonance analysis and acoustic emission monitoring
Nowadays, efficient resource management is often the focus of industry and research. Complex structures or metamaterials, which are often additively manufactured due to their geometries, are increasingly being used to save material. While many characterization methods exist for bulk materials, new adapted methods must first be developed for metamaterials.
For this purpose, acoustic characterization methods such as acoustic resonance analysis or emission monitoring are adapted for this material class. The aim is to work out the factors influencing acoustic signals in order to ultimately be able to determine the quality of a metamaterial. In addition, these are to be placed in the context of additive manufacturing.