Portable EMF Reader
Want a quick and easy EMF reader? All you need is an amplifier and a microphone. The mic will pick up the electromagnetic noise from around you and the amplifier will turn it into something audible.
Obviously this isn't a precise way of measuring, but if you're lacking a gauss meter, or just want to cheaply investigate the EMF in your home, this is a fun solution.
Obviously this isn't a precise way of measuring, but if you're lacking a gauss meter, or just want to cheaply investigate the EMF in your home, this is a fun solution.
Putting It Together
I used a suction cup telephone mic [generally used to record telephone calls] and a battery powered mini amp I picked up from Radio Shack.
Plug the mic into the input jack of the amp.
Plug the mic into the input jack of the amp.
Using It
Turn the volume of the amp to about halfway. If you're not in a Faraday cage, you'll hear a low level buzz. This is the 60 hz background noise that's typical in city dwellings.
Example
Check out the video for a live demo of what you can hear.
http://www.youtube.com/watch?v=---uCklQU9w
[Sorry about how dark it is, light receptor on my camera's burned out].