The invention concerns a cell (28) for converting differential pressure into an electric signal comprising: two chambers (38, 40) filled with an incompressible fluid each delimited by a membrane (32, 34) capable of being deformed by the action of external pressure and separated from each other by a rigid wall (36; 52; 56); a sensor (42) associated with said wall, sensitive to the difference of pressure exerted on either side of the wall, and delivering in response an electric signal. The invention is characterised in that at least one passage (50; 54; 58) is provided between the two chambers (38, 40) and having dimensions adapted for at least attenuating a spurious pressure difference occurring on either side of the wall (36; 52; 56) with a low or even no frequency, and for enabling said sensor to detect the pressure difference exerted on either side of the wall with higher frequencies.
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