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There is a devise that, in addition to being UWB radar, can pick

Customer Question

There is a devise that, in addition
to being UWB radar, can pick up breathing(as
well as every other sound)through solid walls.
What can defeat a very powerful listening devise like this that is practical for the average person
with equivalent amount of technical knowledge?
Can Faraday screens be made small enough
to take care of UWB radar? cost?
Any examples anywhere,that are ACCURATE, of
what high quality UWB radar images of people
look like when taken through solid objects?
Are they like sonograms? Exactly?
Submitted: 11 years ago.
Category: Health
Expert:  xarqi replied 11 years ago.
Can you provide any information or links to informative data on
exactly how UWB radar could be used to monitor sound? I can
think of no physical basis for this, so I must be missing
something.

First, sound is pressure waves in air. The density of air is so low
that it does not reflect radio frequencies (or radio transmission
would be impossible), therefore direct detection of sound is
impossible. These pressure waves do make solid objects move
(eardrums, for instance), but the distance which they move
would be in the sub-millimeter range except for very loud
noises (and certainly not breathing). Since this is below the
wavelength used in UWB radar applications, the exact alterations
in position of any reflector vibrating due to sound could not be
ascertained, so indirect detection is also impossible.

I can't even begin to tackle the first of your questions here
without an explanation of how such a thing could possibly work.

Customer: replied 11 years ago.
Reply to xarqi's Post: As far as I know it is mfg by an
Israeli corp and comes with an extremely
sensitive listening device either attached
or separate.(believe attached)This item is
a huge improvement over existing uwb radar
and issued to military @ least initially.

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