Yup.  In addition, most cellphones get warm when in
use so they tend to warm the area they come in contact
with.

This reminds me of the guy that showed up at my
parents house to do a "free energy audit".  He had, of
all things, a light meter with an inconspicuous bit of
black tape over the logo.  He used it to show my mom
that our windows were terribly energy inefficient and
that we should buy new ones from his company.  I
pointed out that it looked just like a light meter I
had seen in a photography book.  He got very nervous
and departed shortly thereafter.  My mom gave me a
buck for that one!  Pretty good for an 11 year old
kid.  I wonder how many people he suckered with that
one.


--- Mike Hord <mike.hord@gmail.com> wrote:
> > Well, apparently it does work after all. They have
> thermographic
> > images of people's heads after using a cellphone
> for 15 minutes with
> > and without their device.
> > 
> >        
>
http://www.mybiopro.com/AU/research_thermoimaging.aspx?ID=healthfirstnz
> > 
> > Even a graph
> > 
> >        
>
http://www.mybiopro.com/AU/research_graph.aspx?ID=healthfirstnz
> > 
> > OK - that constitutes good old everyday fraud.
> That should be
> > actionable legally and a matter for the police.
> > I'll tell them that and see what happens.
> 
> That may not be fraud- just stupidity.  Try an
> experiment: hold a phone
> (cellular or otherwise) against your ear for 15
> minutes.  Then remove it
> and have a passerby touch your two ears and see
> which one feels
> warmer.  I can virtually guarantee that most people
> will detect warmth
> on the "phone side".  Make sure you hold it tightly
> against the ear!
> 
> It's the classical misunderstanding:  causality
> versus correlation.
> The increased temperature would appear even if the
> user held a 
> chalkboard eraser against his head.
> 
> Mike H.
> 
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