Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!evax!utacfd!merch!rwsys!kf5iw!k5qwb!lrk From: lrk@k5qwb.lonestar.org (Lyn R. Kennedy) Newsgroups: sci.electronics Subject: Re: Remote stereo destruction- truth or fiction? Message-ID: Date: 16 Apr 91 23:17:45 GMT References: <9127.2809ca98@jetson.uh.edu> Organization: Radio Amateur k5qwb Lines: 32 rcte2q@jetson.uh.edu writes: > I have heard this story some several sources.... An E.E., who hates loud musi > builds a device that can cause a stereo system to self destruct. When teens > pull alongside his car with their subwoofers kickin', all it takes is a push > a button, and the sonic pollution is stifled.... > > My question is, is this a B.S. urban legend or not? > > I would think that, since many power amps are designed with a wide bandwidth, > all it would take is a sufficiently strong ultrasonic signal to overload the > amp... which begs the question, how would one inject souch a signal into a > stereo system 10 feet away from you... > > Just something to ponder over. > > --l.liska, UofH If he's listening to the radio you could inject a signal there. I think a 20 Hz square wave on FM would be exciting. If he's using the tape or CD it still might be possible using an AM transmitter. Reminds me of the good-ole-days on 80 meters. Pull in to the Dairy Queen and place your order over the jukebox........ ------------------------------------------------------------------------- lrk@k5qwb.lonestar.org lrk@k5qwb.UUCP 73, utacfd.utarl.edu!letni!rwsys!kf5iw!k5qwb!lrk Lyn Kennedy K5QWB @ N5LDD.#NTX.TX.US.NA P.O. Box 5133, Ovilla, TX, USA 75154 -------- "We have met the enemy and they are us." Pogo -----------------