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Lamb waves have been extensively studied for the detection of flaws in plate-like structures. However operation at low f-d products is usually recommended in order to eliminate the complications of multiple Lamb modes, and low f-d products lead to reduced scattering from small defects. Here we explore the generation of waves at higher f-d products. We explore the transition between the generation of multiple Lamb modes and the generation of a train of nearly longitudinal pulses. We also investigate the transfer of energy from the leading to trailing pulses along with the scattering of the pulse train by simulated defects.