The reliability of a real time unsteady pressure measurement system is of great interest in many domains of industry and research. Experimental constraints often implies the presence of a pneumatic line between the pressure tap and the transducer, which causes an amplitude and a phase distortion of the pressure signal to be measured. Different ways for correction of this resonance phenomenon are proposed in the literature: analogical (active filters), numerical (inverse transfer function), or mechanical (reduction of the tube section on a certain length (restrictor). We stduied this last mechanical correction method that is generally emirically used, without any a priori suitable choice of the position or the geometry of the restrictor.
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