  The correspondence between sound waves, in a de Laval propelling nozzle, and
quasinormal modes emitted by brane-world black holes deformed by a 5D bulk Weyl
fluid are here explored and scrutinised. The analysis of sound waves patterns
in a de Laval nozzle at a laboratory, reciprocally, is here shown to provide
relevant data about the 5D bulk Weyl fluid and its on-brane projection,
comprised by the minimal geometrically deformed compact stellar distribution on
the brane. Acoustic perturbations of the gas fluid flow in the de Laval nozzle
are proved to coincide to the quasinormal modes of black holes solutions
deformed by the 5D Weyl fluid, in the geometric deformation procedure. Hence,
in a phenomenological E\"otv\"os-Friedmann fluid brane-world model, the
realistic shape of a de Laval nozzle is derived and its consequences studied.
