Resonance spectroscopy for solids with layers of different materials

A powerful method for measuring the elastic properties of solid materials is resonance spectroscopy. An advantage of this method is that the experimental measurement is relatively easy, and the difficult analysis is accomplished with a computer program. A particular computer algorithm has become standard because it is fast and may be applied to a wide range of shapes of solid samples. However, the algorithm does not work well for solids with layers of different materials. Fortunately, a relatively easy modification of the customary computer algorithm enables it to work for layered solids.