Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site dmcnh.UUCP
Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!ittvax!sii!dmcnh!gts
From: gts@dmcnh.UUCP (Guy The Schafer)
Newsgroups: net.physics,net.misc
Subject: Re: Re: Microwave and UHF sound detection (bugging embassies, really)
Message-ID: <208@dmcnh.UUCP>
Date: Fri, 21-Jun-85 18:06:24 EDT
Article-I.D.: dmcnh.208
Posted: Fri Jun 21 18:06:24 1985
Date-Received: Mon, 24-Jun-85 03:40:38 EDT
References: <107@ecrcvax.UUCP>, <255@uvm-gen.UUCP> <213@unccvax.UUCP> <956@mhuxt.UUCP>
Organization: Datamedia Corp, Nashua, NH
Lines: 22
Xref: watmath net.physics:2663 net.misc:8143

> >     Allegedly, this was an attempt to use the windowpanes in the US
> > Embassy as a frequency modulator....
> > ...permitting "remote electronic eavesdropping."
> > David Anthony
> 
> ...Such a system seems easy enough to design, so I think we can safely
> assume that the CIA or some such organization has already got them.
> Jeff Sonntag

As a matter of fact, there are government buildings in Washington DC that
have small speakers along the frame of the outside windows directed at
the windowpane surface which continuously pump extraneous noise and/or
music at them.  This protects these windows since it causes them to vibrate
with the closer, more powerful source than the voices of the room's occupants.

Just thought you'd like to know.
+--------------------------------+
| USENET: decvax!sii!dmcnh!gts   |  "It is improper to
| USMail: Guy T. Schafer         |  describe making love
|         14-F Hampshire Drive   |  to one's sister."
|         Nashua, NH  03063      |       - John Irving
+--------------------------------+