Effect of misalignment of air-coupled probes on A o Lamb mode propagating in a metal plate.

Highlights: [•] Three different misalignments – linear, orientation and synchronised orientation were introduced in air-coupled probes. [•] Experiments were carried out on a metallic plate employing the air-coupled probes. [•] A o mode was captured in various configurations and its amplitude was normalised with respect to the reference value. [•] Studied variation in normalised amplitude with the misalignment variable. [•] Gaussian curves were found to be representing appropriately the variation in amplitude with the misalignment variable. [ABSTRACT FROM AUTHOR]