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  • HowStuffWorks

    From the page: "Another source of noise is the cables connecting the devices. These cables act as nice, long antennae for the signals they carry. They broadcast the signals quite efficiently. The signals they broadcast can interfere with radios and TVs. The cables can also receive signals... more

    Reviewed by ShanFit Aug 02, 08:34pm ( 29 reviews ) • howstuffworks.com

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  • Rated by bigoak on Oct 19, 11:37am

    From the page: These "bumps" are called ferrite beads or sometimes ferrite chokes. Their goal in life is to reduce EMI (electromagnetic interference) and RFI (radio-frequency interference).

  • Rated by DrSinePHD on Oct 11, 7:40pm

    You know those knobby bits on your cables? They are called "Ferrite Chokes" and they exist to cut down on the EM noise your toys radiate. Be it your cell phone or your computer monitor, your devices transmit all sorts of incriminating stuff. Next time you spank your monkey to images of transsexual diaper-wearing furries with a fetish for soft cheese keep in mind you are broadcasting a deranged channel for any nerd with a Radio-Shack gift card to receive. Article mined from 'dis guy..

  • Rated by DavidJohns on Aug 17, 10:51pm

    These cables act as nice, long antennae for the signals they carry.

  • Rated by ShanFit on Aug 02, 8:34pm

    From the page: "Another source of noise is the cables connecting the devices. These cables act as nice, long antennae for the signals they carry. They broadcast the signals quite efficiently. The signals they broadcast can interfere with radios and TVs. The cables can also receive signals and transmit them into the case, where they cause problems. A ferrite bead has the property of eliminating the broadcast signals. Essentially, it "chokes" the RFI transmission at that point on the cable -- this is why you find the beads at the ends of the cables. Instead of traveling down the cable and transmitting, the RFI signals turn into heat in the bead. " That is pretty damned interesting. If you've never considered the fact that all of those wires and cables that string the various bits of your electronics equipment together make great antennae then you're probably an average American. Nobody would EVER utilize your ignorance for their own purposes, so rest easy.

  • Rated by SleweD on Jul 22, 2:13pm

    I need to make two of these for my pc speakers to eliminate hiss...

  • Rated by ParallelLines on Jul 22, 10:54am

    Interesting. :)

  • Reviewed by poetofcode on Jul 22, 10:54am

    And I always thought they were to stop the cables falling down the little gaps in desks you thread cables through.