多層材料で反射する超音波のスペクトル変化

抄録

It is theoretically shown that the reflection coefficient of an elastic wave in layers of plates depends on the frequency of the incident wave, the width and the number of layers. Then the spectral change of ultrasonic waves reflected in layers composed of aluminum and steel is measured and compared with the theoretical results. It is found that both results agree well if the bond between the materials is taken into account as one of the elastic layers.