23 fluid tight sealing of the chamber 13 containing the pairs of annular bodies is formed this fluid tight separation yields free selection possibilities with respect to use of attenuation materials thus both closed pore materials and also open pore or cellular materials can be used advantageously pu foams or synthetic rubbers such as ethylene propylene diene rubber epdm preferably foamed epdm can be provided as already noted instead of the illustrated uniform pairs of annular bodies there can annular bodies in a different number and in a different unaligned arrangement on top of one another in particular the resilience which is determined for example by the material density for the inner annular bodies 15 and the outer annular bodies 17 is chosen to be different in order to achieve the desired attenuation characteristics matched to the prevailing frequency band preferably the inner annular bodies 15 nearer the fluid chamber 11 have greater resilience than the outer annular bodies 17 supporting them on the outside the pairs of annular bodies following one another in the axial direction can also have different resilience furthermore the casing 1 could be structured such that especially at an elevated pressure level the outer wall 5 as the support of the outer annular bodies 17 has a rigid structure for example metallic structure while the inner wall 3 is formed from a resilient elastomer to effectively couple the pressure surges to the attenuation material the casing of the body 17 can also be applied by special enamels coatings in an immersion painting or spraying process these enamels are based for example on hnbr or viton u00ae a layer of more or less any thickness can be applied by repeated immersion or spraying until a fluid tight and resistant layer has been.