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3. What kinds of phones are the
subject of this update?
The term 'wireless phone'
refers here to handheld
wireless phones with built-in
antennas, often called 'cell',
'mobile', or 'PCS' phones.
These types of wireless
phones can expose the user
to measurable radiofrequency
energy (RF) because of the
short distance between the
phone and 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 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
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