Does exposure to electromagnetic fields (EMF) affect the brain?
First, some terminology. Electricity is movement of electrons (current) through a wire. AC current is the type of electricity that runs through power lines. AC current produces an electric field and a magnetic filed. Electric fields are easily shielded and weakened by walls and objects. Magnetic fields can pass through buildings, humans, etc… Therefore, the magnetic component is more commonly studied in relationship to development of cancer.
Electromagnetic fields are invisible lines of force created whenever electricity is generated or used. Produced by power lines, electric wiring, electric equipment, computers, televisions, cell phones, appliances and more. Measured in Hertz (Hz, cycles per second). Most studies focus on 50-60Hz fields, the same frequency as that used for power transmission. Logically, the strength of the magnetic field decreases rapidly as the distance increases.
Exposures to common daily appliances and objects
|Garage Door Openers||40 megahertz|
|Alarm Systems||40 megahertz|
|Cordless Phones||40-50 megahertz|
|Baby Monitors||49 megahertz|
|Radio controlled airplanes||72 megahertz|
|Radio controlled cars||75 megahertz|
|Wildlife tracking collars||215-220 megahertz|
|MIR space station||145 megahertz and 437 megahertz|
|Air Traffic Control Radar||960-1215 megahertz|
|Global Positioning system||1227 and 1575 megahertz|
|Microwave oven ( depends on the size)||2450 megahertz|
|Cell phones||824-829 megahertz|
Are cell phones dangerous? Follow the blog for the answer.