Explicit expressions for the acoustic reflection coefficients from the interfaces are given and ultrasonic experiments for measuring the interface stiffness constants are described.
文章还给出了两相同固体中界面声反射系数的表达式，介绍了测量界面劲度常数的超声反射谱方法。
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Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2: dynamic stiffness of elastic supports for translatory motion - Direct method.