On Sat, 14 Oct 2006 19:01:06 -0800, "Dana"
wrote:


"Alexander Grigoriev" wrote in message
hlink.net...
So it can tell semiconductor junctions of an MP3 recorder from
semiconductor
junctions of non-recording devices?

Th OP question was detection not *any* semiconductor device, but a MP3
recorder. By the way, the recorder doesn't have to be in that room. Enough
to have a connected cellphone in a pocket.

Yep, and that can be detected.

By that you must specifically mean the cell phone.
Clear details matter a lot.

What you do with the knowledge that the person has an electronic device that
may or may not record is up to you and what you want to do.

It's essentially useless information because in modern
societies every other person has a cell phone or beeper, MP3
player or whatever. One could not conduct business in an
environment where they had to make some random speculation
every time they came across the existence of an unknown
electronic device, but as importantly, it still has not even
been established than in any specific scenario, the MP3
recorder would be detected at all. yes it's possible to
detect that an object exists, but it's also possible to have
a scenario where the testing method doesn't detect it.