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exposure
from
wireless
phones
and
other
wireless
handsets
with
the
participation
and
leadership
of
FDA
scientists
and
engineers.
The
standard,
'Recommended
Practice
for
Determining
the
Spatial-Peak
Specific
Absorption
Rate
(SAR)
in
the
Human
Body
Due
to
Wireless
Communications
Devices:
Experimental
Techniques,'
sets
forth
the
first
consistent
test
methodology
for
measuring
the
rate
at
which
RF
is
deposited
in
the
heads
of
wireless
phone
users.
The
test
method
uses
a
tissue-simulating
model
of
the
human
head.
Standardized
SAR
test
methodology
is
expected
to
greatly
improve
the
consistency
of
measurements
made
at
different
laboratories
on
the
same
phone.
SAR
is
the
measurement
of
the
amount
of
energy
absorbed
in
tissue,
either
by
the
whole
body
or
a
small
part
of
the
body.
It
is
measured
in
watts/kg
(or
milliwatts/g)
of
matter.
This
measurement
is
used
to
determine
whether
a
wireless
phone
complies
with
safety
guidelines.
9.What
steps
can
I
take
to
reduce
my
exposure
to
radiofrequency
energy
from
my
wireless
phone?
If
there
is
a
risk
from
these
products
---
and
at
this
point
we
do
not
know
that
there
is
---
it
is
probably
very
small.
But
if
you
are
concerned
about
avoiding
even
potential
risks,
you
can
take
a
few
simple
steps
to
minimize
your
exposure
to
radiofrequency
energy
(RF).
Since
time
is
a
key
factor
in
how
much
exposure
a
person
receives,
reducing
the
amount
of
time
spent
using
a
wireless
phone
will
reduce
RF
exposure.
If
you
must
conduct
extended
conversations
by
wireless
phone
every
day,
you
could
place
more
distance
between
your
body
and
the
source
of
the
RF,
since the
exposure
level
drops
off
dramatically
with
distance.
For
example,
you
could
use
a
headset
and
carry
the
wireless
phone
away
from
your
body
or
use
a
wireless
phone
connected
to
a
remote
antenna.
Again,
the
scientific
data
do
not
demonstrate
that
wireless
phones
are
harmful.
But
if
you
are
concerned
about
the
RF
exposure
from
these
products,
you
can
use
measures
like
those
described
above
to
reduce
your
RF
exposure
from
wireless
phone
use.
Safety
Guidelines
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