What Does Electromagnetic Interference (EMI) Mean?
Electromagnetic interference (EMI) is a phenomenon where one electromagnetic field interferes with another, resulting in the distortion of both fields. This is commonly observed in radios when switching between frequencies and static is heard, as well as on over-the-air TV when the picture becomes distorted because the signal has been distorted.
Techopedia Explains Electromagnetic Interference (EMI)
Electromagnetic Interference is a disturbance in the radio frequency spectrum that affects fields even if their frequencies are not aligned. This is because electromagnetic radiation can still interfere with each other even if they are not on the same frequency, and this is exacerbated by the fact that devices emitting electromagnetic waves have a tendency to also transmit at lower power on harmonic side bands, which is why an FM radio might pick up powerful signals from a nearby CB radio.
