The invention concerns a fluidic oscillator (21) symmetrical relatively to a longitudinal plane of symmetry (P), comprising a chamber (25) delimiting an oscillation chamber (27) and having an inlet and an outlet (45) through which the fluid flows and which are arranged along said plane (P) in one first direction said to be longitudinal (A), said inlet being shaped in the form of a narrow slot (57; 93) in a second direction (B) said to be transverse to said plane (P), elongated in a third direction (C) parallel to said plane (P) and perpendicular to said first longitudinal direction (A), characterised in that said slot (57; 93) is provided in a part (55; 91) removable with respect to said chamber (25).
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