MATELYS is an independent research lab, worldwide renown for its expertise in the following domains of activity : 1) the characterisation of the acoustic, elastic and damping properties of various materials, including foams, fibrous, screens, perforated plates, granular materials, visco-elastic materials, metamaterials, ... 2) the modelling of the vibro-acoustic performance of systems, 3) the conception of innovating solutions for the control of noise and vibration according to prescribed specifications, 4) the design of vibro-acoustic software products, 5) the provision of acoustic testing equipments.