On 10 Oct 2006, kony wrote:

On Tue, 10 Oct 2006 15:51:51 +0100, Joey
wrote:


You say, "search them physically"? I have to tell you that I don;'t
work in the sort of environment where that kind of behaviour is
considered acceptable!


Then the only practical alternative remaining is to have
them consent to and go through a metal detector, and of
course it has to be actively manned to discriminate a
potential recorder from some other device, object, etc.

If you find what might be an MP player, you won't be able to
determine if it's recording, rather than playing, or if
recording off the radio. Unless MP3 players become
illegal devices, or at least clearly posted as banned on
private premises, you can't justify a search or seizure
either (depending on laws in your locale). If private
property, the other party may still refuse a search and
seizure attempt.

Even scanning for such a device's radiated energy at
entrance to an area, that wouldn't prevent them from turning
on the device later. Unless you have the expectation that
you can seize such equipment, you should follow the same
guidelines you should have otherwise- not saying anything of
importance in the presence of someone who can't be trusted
not to repeat, reproduce, etc., in any way.

Ultimately going to such extra lengths will tend to make
people suspect you have something to hide and put your
activities under more scrutiny.


Thanks Kony. So the MP3 recorder is essentially undetectable during its
operation. OK. Thanks.

Maybe that explains why I can't find any follow-on products for tape
recorder detection while many of the the older devices are no longer
available.