Titlebook: Nondestructive Characterization of Materials VI; Robert E. Green,Krzysztof J. Kozaczek,Clayton O. R Book 1994 Plenum Press, New York 1994

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Air-Coupled Ultrasonic System for Detecting Delaminations and Cracks in Paintings on Wooden Panelsminations. The system enables measurements to be easily made of highly anisotropic and inhomogeneous materials such as wood..The ultrasonic system used in this study has a superior signal-to noise ratio because it uses efficient transducers, low noise pre-amplifiers, and a phase-sensitive superheter

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