| 主权项 |
1. Shielding comprising:
a perforated inner sheet metal layer; an outer sheet metal layer, wherein a hollow space delimited by the perforated inner sheet metal layer and the outer sheet metal layer is defined, and wherein the outer sheet metal layer at its edge is flanged over the perforated inner sheet metal layer; and wherein a plurality of essentially spherical metallic hollow bodies that are loosely arranged in the hollow space, wherein the minimum diameter of the hollow bodies is greater than the perforation of the inner sheet metal layer. |
