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Safety Guidelines
the user's head. These RF exposures
are limited by FCC safety guidelines
that were developed with the advice
of the FDA and other federal health
and safety agencies. When the
phone is located at greater distances
from the user, the exposure to RF is
drastically lower because a person's
RF exposure decreases rapidly with
increasing distance from the source.
The socalled 'cordless phones, '
which have a base unit connected
to the telephone wiring in a house,
typically operate at far lower
power levels, and thus produce RF
exposures far below the FCC safety
limits.
4. What are the results of the
research done already?
The research done thus far has
produced conflicting results, and
many studies have suffered from
flaws in their research methods.
Animal experiments investigating
the effects of radiofrequency
energy (RF) exposures characteristic
of wireless phones have yielded
conflicting results that often cannot
80
be repeated in other laboratories. A
few animal studies, however, have
suggested that low levels of RF
could accelerate the development
of cancer in laboratory animals.
However, many of the studies
that showed increased tumor
development used animals that
had been genetically engineered
or treated with cancer causing
chemicals so as to be pre-disposed
to develop cancer in the absence of
RF exposure. Other studies exposed
the animals to RF for up to 22 hours
per day. These conditions are not
similar to the conditions under
which people use wireless phones,
so we don't know with certainty
what the results of such studies
mean for human health. Three
large epidemiology studies have
been published since December
2000. Between them, the studies
investigated any possible association
between the use of wireless phones
and primary brain cancer, glioma,
meningioma, or acoustic neuroma,
tumors of the brain or salivary
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