The ferrite core function resembles that of an inductor, but the ferrite core frequency response deviates from this functionality at high frequencies. Unfortunately, ferrite beads (also called a ferrite choke, ferrite clamp, ferrite collar, EMI filter bead, or even a ferrite ring filter) can be a bit of a mystery. One possible fix for that kind of interference is a ferrite bead. While we may not be able to see EMI, we can sometimes hear it when it comes through audio circuits. Instead of having to mess around with complicated setups and signal analyzers, I could just look and see what all the fuss is about. Sometimes, I wish I could see electromagnetic waves. Ferrite beads are generally used for high frequency EMI noise suppression
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