2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226713In this paper the acoustic field propagating in the early hot ($p=ε/$) universe of arbitrary space curvature ($K=0, \pm 1$) is considered. The field equations are reduced to the d'Alembert equation in an auxiliary static Roberson-Walker space-time. Symbolic computation in {\em Mathematica} is applied.5 pages LaTeX, Some minor changes introducedSymbolic ComputationGeneral Relativity and Quantum CosmologyComputational Physicstext