with the purpose of attaining effective reduction of vertical vibrations , there is arranged in vertical direction between the vibrating mass and the excitation source one or more little - damped springing systems which include compressed - air springing elements provided with a connecting pipe for the inlet or outlet of compressed air , whereby active intervention in the functioning of base springing systems is made possible . the active intervention concerns the vibrating of the mass in the resonance of the systems , and consequently , these systems may be provided only with the dampers which enable low damping or may be even without dampers at all . moreover , between the vibrating mass and one or more springing systems , or between the springing systems and the excitation source , there is arranged one or more acceleration transformers in vertical direction . the deformation of each acceleration transformer amplified by the corresponding deflection amplifier opens its main valves , which proportionally to their displacement in the sense of opening thereof , let compressed air flow into the corresponding springing element or out of it into the atmosphere .