2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26275Avoided band crossings have been studied theoretically and it has been shown that they can provide a tunning of the metal-insulator transition. Here we present an experimental example of an avoided band crossing for a classical undulatory system: torsional waves in locally periodic rods. To excite and detect the torsional waves, an electromagnetic-acoustic transducer for low-frequencies that we have recently developed, is used. Calculations performed using the transfer matrix method agree with the experimental measurements. In the observed avoided band crossing one level, which is a border-induced bulk level, moves from one band to the next.4 pages, 7 figures, some in colorMesoscale and Nanoscale PhysicsDisordered Systems and Neural Networkstext