Relationship between impedance matching and Electromagnetic Interefence

Hello all.

I have heard that impedance matching is an effective way to suppress the electromagnetic interference. Is that true? If yes, how and why?

How come an impedance coil connected to input of a system can avoid EMI?

Thanks in advance for your kind responses.

Regards.

I'm not quite sure but I think if you dont match you get reflections

Reflections can lead to standing waves. This means high voltages and/or currents which generate large electric and magnetic fields

But again, thats just a theory..