  A model for an expanding noncommutative acoustic fluid analogous to a
Friedmann-Robertson-Walker geometry is derived. For this purpose, a
noncommutative Abelian Higgs model is considered in a (3+1)-dimensional
spacetime. In this scenario, we analyze the motion of test particles in this
fluid. The study considers a scalar test particle coupled to a quantized
fluctuating massless scalar field. For all cases studied, we find corrections
due to the noncommutativity in the mean squared velocity of the particles. The
nonzero velocity dispersion for particles that are free to move on geodesics
disagrees with the null result found previously in the literature for expanding
commutative fluid. We interpret our result as a piece of direct evidence for
the noncommutativity of space, which could be possibly detected in future
table-top experiments.
