What Is Electromagnetic Shielding?

By Author: Emscan
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You see examples of electromagnetic shielding every day without even realizing it. While there are many scientific explanations of what this type of shielding is and what it does, but many people don't understand all that technobabble. Here then is a simple explanation that anyone can understand.

The world around use is filled with electromagnetic fields, from the field around the Earth, to the fields that are being produced by electronic devices and strong power sources. Electromagnetic shielding does two important things. It prevents these fields from spreading
out. For an example, when you drive by a power relay station, you may feel a strong presence. Some people feel like they are being watched.

Some people may feel the hairs on the back of their neck stand on end, or they may feel a slight headache. This is because of the electromagnetic waves that are being emitted by the high voltage power lines, the transformers, and the relays. All of these have electromagnetic shielding around them, so imagine what would happen if these weren't in place?

The second thing that electromagnetic shielding does ...
... is prevent these same fields from affecting electronics. For an example, the hard drive on your computer has this shielding around it so that these fields can erase important data. Let's say that you have your hard drive set up close to a large speaker. These speakers have powerful magnets, and can erase a hard drive if it wasn't shielded. One perfect example of this is with the old style VHS tapes and music cassettes. These information tapes could easily be erased if set near a magnet, and that is how many people would use the tapes over and over.

There is also shielding that allows some waves to pass through and block out others, and these have holes in them that correspond with the different radiation waves.

These are just a couple of examples of what electromagnetic shielding is. These shields can be the size of buildings, all the way down to smaller than a dime, depending on its application. There are some drawbacks to having electromagnetic shielding, but it is an essential part of our everyday lives. One of the drawbacks is that this shielding can interfere with certain radio waves, like cellular phones and other wireless devices. They can block the connection between the signals, and can even bounce them back to the sending unit.

Electromagnetic shielding can be made from a variety of different materials, and while traditionally, some kind of metal was used, with today's technology these shields can be made from a variety of dense plastics. This means that these shields are smaller, lightweight and can be used in even more applications.

More detailed information on electromagnetic shielding can be found from a number of different online resources. You can also find out more about electromagnetic fields, how they are produced, and how they affect our lives.

For More Information Visit:-http://www.emscan.com/emxpert/EMx_Action.cfm , http://www.emscan.com/emxpert/EMx_shielding.cfm