A system for the collection of physiological fluids includes a vacuum source that is controlled to provide low vacuum as a function of whether fluids are entering the system. The window comprises a trapezoidal prism, a longer side surface of the parallel side surfaces of which forms a surface facing the medium. The soundproof panel may be a soundproof panel 1 comprising a nonwoven structural member 2 and a honeycomb member 3 stacked thereto. Discharge event detectors are coupled to the impedances.