The four-layer shielded cylinder WAS effective in blocking even strong local radio and TV signals, and cell phone operation. 但四层的屏蔽圆柱在阻止当地强大的广播和电视信号以及蜂窝电话时是有效的。
Magnetic Field Shielding Analysis of Shielded Cell with 3D Finite Element Method 屏蔽室对磁场屏蔽效能的三维有限元计算分析