How it’s invading your signal. Electromagnetic interference, often referred to as EMI, is a degradation of the performance of a piece of equipment or system caused by electromagnetic radiation.

If every highway were smooth as glass, our cars wouldn’t need suspension systems. But it’s simply unrealistic to expect such highways – we pretty much have to accept them as they are. The same is true for the AC power line.

Let’s start with the source of hums and buzzes in a system. Is the power line generally the source?

Internal factors include overloaded outlets, old and overused extension cords, faulty wiring, or the presence of high-power electrical devices on the grid.