Analytical study of wave propagation in elastic conduits

In this paper, an analytical resolution of a periodic signal propagation eq uation is presented. At a given site of the conduit, the proposed solution allows one to isolate the part linked to the signal emitted at the extremit y of the conduit and the part that would exist in its absence. The investig ation of the evolution of this signal located at the extremity allows us to determine the length of the tube (in the particular case of a solitary wav e) using the analysis of reflections at a given site. (C) Academie des Scie nces/Elsevier, Paris.