... of the signals are essential. The purpose of this paper is to provide optimal noise filtering technique for Lamb waves in the diagnosis of structural singularities. Design/methodology/approach Filtration of time-frequency information of multimode Lamb waves through the noisy signal is investigated...

... of dispersion curves. Because of a shear coupling in monoclinic lamina wave oscillation vectors generally are not perpendicular to the panel surface plane and the displacement ratios r₂ and r₅ do not vanish. In this case the modes are called quasi Lamb waves. Ratio curves...