2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49196We develope a theory of sound in a relativistic superfluid with quantum vortices. The vortices are presented by vortex fluid. For a particular separable model we find new modes of which a non-relativistic superfluid is deprived.16 pages, RevTeXHigh Energy Physics - Phenomenologytext