The disturbance caused by an electromagnetic field affecting the operation of electronic devices.

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Electromagnetic interference is the disturbance caused by electromagnetic fields that disrupt the operation of electronic devices. It happens when unwanted energy from a field couples into a system, causing errors, malfunctions, or degraded performance. Insertion loss is about signal loss when a component or line is added, not about external disturbance. Dielectric constant is a material property that affects how a field interacts with that material, not the disturbance itself. EMC, electromagnetic compatibility, is the broader discipline that aims for devices to operate without emitting excessive interference and without being overly affected by it; it describes the overall capability, not the disturbance alone. So the term that best matches “the disturbance caused by an electromagnetic field affecting the operation of electronic devices” is electromagnetic interference.