As compressor blades are subject to high dynamic loads, there is a particular interest in determining their modal properties under operating conditions. In addition, intensive research is being conducted into the development of fibre-reinforced epoxy blades due to the high specific stiffness and strength as well as the high damping of composite materials. The presentation will give an insight into the design and testing of composite compressor blades as well as an overview of experimental techniques for determining the vibration behaviour of rotating components.