Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!aries!forbes
From: forbes@aries.scs.uiuc.edu (Jeff Forbes)
Newsgroups: sci.electronics
Subject: Re: Car alarms
Message-ID: <1991Mar30.190812.16963@ux1.cso.uiuc.edu>
Date: 30 Mar 91 19:08:12 GMT
References: <109730@unix.cis.pitt.edu>
Sender: usenet@ux1.cso.uiuc.edu (News)
Organization: School of Chemical Sciences, Univ. of Illinois at Urbana-Champaign
Lines: 20

In article <109730@unix.cis.pitt.edu> cwcst1@unix.cis.pitt.edu (Carol Coates) writes:
>
>	2) Use the power-locks (continuous "lock"), blast the siren
>	   INSIDE the car, and cut the engine. This, of course, would 
>	   be after several attempts at the keypad and/or "owner" switch. 
>	   Not sure if it's legal to cause a headache to a criminal - 
>	   with that wonderful judicial system of ours [gasp...puke]
>
>	#2 is for those whose car has been stolen in the past - great if
>	you get to watch the incident - in person... ;-)
>

You probably don't want to lock the doors. With a 130 dB 2500 Hz 
piezoelectric siren the would be thief would not want to stay in the
car for long. I believe that 2500 Hz is the peak in human ear sensitivity.

Jeff Forbes

"....I have not failed. I've just found 10,000 ways that won't work."
			Thomas Edison