The leaky lamb wave technique is based on insonification of the test object at an oblique angle to induce plate waves.
👉 The leaky lamb wave technique is based on insonification of the test object at an oblique angle, where the wave is refracted and mode converted to induce plate waves.
👉 When excited, these waves propagate along the plate and are strongly affected by the properties of the bond.
👉 The leaky lamb wave technique uses two transducers in a pitch catch arrangement.
👉 The test object is typically immersed in a water tank or a water column is maintained between the transducers and the object surface.
👉 For a fixed angle of insonification, the acoustic waves are mode converted to lamb waves at specific frequencies, resulting in leakage of acoustic radiation into the fluid.
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