“…Vibroacoustic behavior of structures within an acoustic waveguide can be coupled such that at certain frequencies, a standing wave can propagate within the space of the waveguide. In this case, an excited shell within an underwater waveguide can generate standing waves along the đť‘Ą-direction, perpendicular to the acoustic boundaries, at frequencies that are found by the standing waves criterion (Kha et al, 2022)…”