# numbing a magnetic field **URL:** \ **Category:** Factual Questions\ **Created:** [June 6, 2002, 12:53am UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574 "2002-06-06T00:53:51Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Kevin\_Partida](https://avatars.discourse-cdn.com/v4/letter/k/b4bc9f/32.png) [@Kevin\_Partida](https://boards.straightdope.com/u/Kevin_Partida)\ **Post date:** [June 6, 2002, 12:53am UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/1 "2002-06-06T00:53:51Z")
Ok, I am hoping that someone can shed some light on a problem that I am currently having. Before today I had two large floor speakers on the left and right side of my CRT monitor. Although they were extremely large, they didn’t seem to be too much of a problem for the monitor. Today, however, I had to replace the speakers because I blew them. The new pair that I bought make the monitor go crazy. I thought about replacing it with an LCD, but I’d rather just figure out a way to keep the CRT without all the distortion. Anyway, is there an type of material that I could place in between the two speakers and the monitor in order to numb the magnetic field, or preferably eliminate it? I don’t really have another place to put the speakers, so moving them is going to be an absolute last resort. Thanks. ---
**Author:** ![Tuckerfan](https://avatars.discourse-cdn.com/v4/letter/t/eada6e/32.png) [@Tuckerfan](https://boards.straightdope.com/u/Tuckerfan)\ **Post date:** [June 6, 2002, 3:19am UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/2 "2002-06-06T03:19:57Z")
There’s a Faraday cage, but if you put one of those around your monitor, you’d have a hard time seeing anything on the screen. Your best bet is to move your speakers. You might not have to move them very far to eliminate the effect. ---
**Author:** ![andy\_fl](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@andy\_fl](https://boards.straightdope.com/u/andy_fl)\ **Post date:** [June 6, 2002, 1:54pm UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/3 "2002-06-06T13:54:15Z")
Put two iron (tin) sheets on the sides of the monitor. It will work. If you are wondering where to get tin sheets, just use any old computer tower, open it up and use the side panels. Basically, iron will act as a shield, so use iron sheets however you need. ---
**Author:** ![CC](https://avatars.discourse-cdn.com/v4/letter/c/f1d935/32.png) [@CC](https://boards.straightdope.com/u/CC)\ **Post date:** [June 6, 2002, 3:31pm UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/4 "2002-06-06T15:31:20Z")
I think Andy is trying to say use iron. But because iron is not tin the answer is somewhat confusing. Iron is a magnetic, tin not. I can’t see how using tin would make a difference. I would like to know more about this questions so I’ll stay tuned. ---
**Author:** ![Wonko\_The\_Sane](https://avatars.discourse-cdn.com/v4/letter/w/258eb7/32.png) [@Wonko\_The\_Sane](https://boards.straightdope.com/u/Wonko_The_Sane)\ **Post date:** [June 6, 2002, 8:16pm UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/5 "2002-06-06T20:16:48Z")
Tin blocks magnetic fields. Even the tin plating on an iron sheet will do it. That’s probably what he meant. ---
**Author:** ![PhilAlex](https://avatars.discourse-cdn.com/v4/letter/p/839c29/32.png) [@PhilAlex](https://boards.straightdope.com/u/PhilAlex)\ **Post date:** [June 6, 2002, 8:26pm UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/6 "2002-06-06T20:26:14Z")
You can get stuff called MU-METAL to block fields. ---
**Author:** ![conway](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@conway](https://boards.straightdope.com/u/conway)\ **Post date:** [June 6, 2002, 8:39pm UTC](https://boards.straightdope.com/t/numbing-a-magnetic-field/112574/7 "2002-06-06T20:39:22Z")
This may be helpful: [http://www.audiovideo101.com/learn/askus/displayaskus.asp?questionid=89&List=6](http://www.audiovideo101.com/learn/askus/displayaskus.asp?questionid=89&List=6)