Abstract
The characters of the long Langevin type transducers are already analyzed, but the elastic constants of the adhesive layer, to be used in this theory, are not clarified sufficiently. The writer made a study of this problem. It is assumed in this study, that the lateral displacement of the adhesive layer is limited by the displacements of the metallic part and the electro-strictive layer by continuity requirements. As a result, it was clarified that the wave type to be applied for the adhesive layer is a type close to the bulk wave. It is confirmed that the theoretical values introduced from this treatment are in good agreement with the experimental values. Consequently the effective elastic constants for the adhesive layer in the Langevin type transducers were clarified.
