A Faraday Cage is an enclosure formed by conductive material or by a mesh of such material, used to block external electromagnetic fields. In audio engineering, this concept is the fundamental mechanism behind screening or shielding. It works because an external electrical field causes the electric charges within the cage's conducting material to be distributed such that they cancel the field's effect in the cage's interior. This phenomenon is vital for protecting sensitive, low-voltage audio signals from Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI). While true Faraday cages protect against static electric fields, the mesh screens found in microphone cables are designed specifically to intercept varying electromagnetic waves, draining the induced noise to the ground before it can contaminate the audio conductor inside.