From:	Ulrich Haupt <sandman@****.UNI-OLDENBURG.DE>
Subject:	Re: Ultrasound vision
Date:	Wed, 3 Feb 1999 15:23:24 +0100

Marc Renouf wrote:
<snip ultrasound so far>
> One caveat here, though. If someone else is using an ultrasound
> sight on the same frequency (or frequencies), you will be able to see
> them. They will look like a bright light (again, just like having a
> flashlight strapped to your gun). In this sense, ultrasound is a double
> edged sword. Like all other active sensors, it provides information but
> may tip off your opposition to your presence.
>
> Does this make sense?

And don't forget about animals like dogs. They possibly can
hear you ver well.
I don't know how good the para critters are but they could
hear you just when
you think you tricked them out!

And I think I've read something about sound detectors in
secure areas ...

<egmg> - (stolen from David Buehrer)

Sandman