than do the wireless phones themselves, the RF
exposures that people get from these base
stations are typically thousands of times lower
than those they can get from wireless phones.
Base stations are thus not the subject of the
safety questions discussed in this document.
3. What kinds of phones are the subject of this
update?
The term “wireless phone” refers here to hand-held
wireless phone 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 Federal
Communications Commission safety guidelines that
were developed with the advice of 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 phone 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
predisposed 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
TIA Safety Information
TIA Safety Information
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