Helpful Terms To
Understand Cell Phone Radiation And Emf Protection
Cell Tower
Life Bluetube Headsets
Cell Phone Towers Health Effects
EM Field Meter
Cell Phone Sensitivity
Electricity is simply the flow of electrons. This can occur
over a high power transmission line or through wiring in the
home or office. Whenever electricity passes through a wire
two fields of force are created. One is an electrical field
and the other is a magnetic field. In the United States
electrical current reverses direction 60 times each second
and thus is called alternating current, or AC. The cycles of
current are measured in a unit called Hertz (Hz) so named
for the German physicist Heinrich Hertz. Hertz is simply
defined as the number of cycles per second. Electrical
current in the U.S. operates at 60 Hz while electricity in
most other parts of the world operates at 50 Hz. Most
electric power in the U.S. is of an extremely low frequency,
i.e., under 3000 Hz. As frequencies increase, the distance
between one wave and the next becomes shorter and shorter.
Consequently, there is a greater amount of energy generated
in the field. Shorter wavelengths mean greater energy.
Electrical fields can be shielded rather easily by using
metallic barriers.
However, magnetic fields, such as those in the 60 Hz range,
will easily penetrate through most any barrier and become
very difficult, if not impossible, to shield. It's important
to understand the term Hertz (Hz) since it is used commonly
to express the frequencies of appliances and devices like
cell phones and microwave ovens. Megahertz (MHz) is one
million hertz and gigahertz (GHz) is one billion hertz or
one billion cycles per second. Most cell phones operate in
the frequency range of 800 to 2200 megahertz. To make a
comparison, the human heart being dependent upon electrical
function, beats in a frequency of 2 Hz, or two cycles per
second. Most electrical activity of the human body operates
in the hertz range.
Another important term is gauss, or milligauss (mG). This
unit measures the intensity of the magnetic field. It was so
named for the German astronomer and mathematician Karl
Gauss. A milligauss is one one-thousandth of one gauss. As
an example, the earth has a natural magnetic field that has
been measured to be about 0.5 gauss. Since humans have been
exposed to the earth's natural magnetic field from the
beginning of their existence this natural magnetic field is
not harmful to the human body.
However, power lines, electrical appliances, electrical
wiring, cell phones, etc. all give off magnetic fields that
are not natural to mankind. The intensity of these fields is
expressed through the term milligauss. Abnormalities in
embryos can be produced from magnetic fields as little as
one milligauss. (11) Studies have shown a 500% increase in
the risk of childhood leukemia, lymphomas and brain tumors
in children exposed to power lines generating an
electromagnetic field of only four milligauss. (12) Most
scientists believe we should be exposed to no more than 1 mG.
Small handheld meters called gaussmeters can be purchased
inexpensively to measure the electromagnetic field in the
home and office. However, the gaussmeter only measures the
intensity of the magnetic field. It does not measure the
wireless signal or information-carrying radio wave.
Hertz measures frequency and milligauss measures intensity.
Keep those terms in mind as you read information about
devices such as cell phones and common household appliances.
Tanzania, Dar es Salaam
Bhutan, Thimphu
Sydney, Australia
New Zealand, Wellington
Chile, Santiago
Afghanistan, Kabul
Guyana, Georgetown
Lobamba (legislative)
United Arab Emirates, Abu Dhabi
Brunei, Darussalam Bandar Seri Begawan
http://www.emfnews.org/store |