Very often devices are used, whose signal ground is often connected with the protective conductor (antenna or cable systems, computer), so that ground loops are unavoidable.
The interference signal can manifest itself in sound systems as undesired, interfering buzzing sound or in television as interfering strips.
The sheath current filters often help here.
The sheath current filter interrupts the line galvanically.
In this way, only the high-frequency signal portion is transmitted and the low-frequency interfering signal is suppressed.
This text is machine translated.