EMC is defined as:
The ability of systems, equipment, and devices that utilize the electromagnetic spectrum to operate in their intended operational environments without suffering unacceptable degradation or causing unintentional degradation because of electromagnetic radiation or response. It involves the application of sound electromagnetic spectrum management; system, equipment, and device design configuration that ensures interference-free operation; and clear concepts and doctrines that maximize operational effectiveness.
What Actually Causes EMI Problems:
Equipment Malfunctions due to EMI
Interference Mechanisms
The main reasons that EMC is becoming an important aspect of elctronic equipment design are: