Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!bellcore!decvax!decwrl!greipa!pesnta!hplabs!sri-unix!mikes@AMES-NAS.ARPA From: mikes@AMES-NAS.ARPA Newsgroups: net.physics Subject: Re: Microwave and UHF sound detection (bugging embassies, really) Message-ID: <320@sri-arpa.ARPA> Date: Wed, 26-Jun-85 12:05:18 EDT Article-I.D.: sri-arpa.320 Posted: Wed Jun 26 12:05:18 1985 Date-Received: Mon, 1-Jul-85 06:56:31 EDT Lines: 5 From: mikes@AMES-NAS.ARPA (Peter Mikes) Indeed - the device is based on Laser Doepler Velocitometry - and works simply by measuring the distance of the panel as function of time. Such devices (for scientific purposes) are avalable comercialy e.g. by HP.