Filter
Top Products
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 so-called
‘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 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 gland,
leukemia, or other cancers. None of the
studies demonstrated the existence of
any harmful health effects from
wireless phone RF exposures. However,
none of the studies can answer
questions about long-term exposures,
since the average period of phone use
in these studies was around three
years.
67
Safety Guidelines
CG180_Eng_0806 8/6/07 9:39 AM Page 67