Many advances in the design of composites adhesive bonded joints have been made in the last years. Since this kind of bondings are often use in lightweight structures such as aircraft, it is crucial to ensure that the bonded joints do not cause an effectively reduction in the stiffness of the entire system. The purpose of this thesis is to provide an innovative technique of inspection of joints. This strategy is based on the evaluation of the dispersion relations. The goal is to compare the dispersion diagrams obtained from the examined joint with the diagram resulting from the evaluation of the pristine specimen that acts like a reference case.