2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/84043The dispersion relation and mode amplitudes of oblique surface waves propagating on an acoustic double comb filter are obtained with a method based on the calculus of residues. We obtain a better agreement (below 480 Hz) between theoretical predictions and measurements reported previously when the filter was being supposed to be made of a single comb structure.9 pages, 2 figures. Published in Journal of Sound and VibrationClassical PhysicsGeneral Physicstext