Stop GSM noise with ferrite beads
If you’ve ever had a GSM phone near speakers and hear a very annoying buzzing and crackling sound then you’ve heard what’s referred to as “GSM noise” or “GSM buzz”.
It has to be one of the most annoying sounds in the world, but it seems there’s an easy fix courtesy of ferrite beads.
If you’re not familiar with ferrite beads, they’re often used to suppress high frequency noise in electronic circuits. If you’ve ever looked at a USB cable and wondered what that fat piece of plastic was for near the end that plugs into your computer, wonder no more–it holds ferrite beads.
Apparently if you attach these to where the audio cable connects to your speakers the sound should be nearly eliminated. Just grab it from an extra USB cable or check with your local Radio Shack for something called a “Snap Choke Core” which will snap onto your cables. It looks like they have two: one for $2.99 and another for $5.29.
For more info check out the original article at Mac Life.