Electromagnetic compatibility (EMC) is the desired property of technical devices not to interfere with each other through unwanted electrical or electromagnetic effects. Two types of interference can be distinguished here.
In the case of conducted interference, the affected products are directly connected to each other via cables (e.g. the crackling of the stereo system when a light switch is activated). In the case of field-bound interference, the interference signal is transmitted as an electromagnetic field (e.g. rattling loudspeakers during a mobile phone call). There are often two specifications for components. One is the level of the radiating effects (emissions), the other is the tolerance of the component to the effects radiated by other components (immunities).