anyone got any info as the maximum legal volume/frequency and how long it can go on for, for a car alarm?

cheers

Does it matter?? no-one around here ever pay's any attention to alarms, and when you ring the fuzz about your car just getting broken in to, they give you a crime ref no. and don't even turn up, so what's the point???

I think mine pump's out around 120 odd dec of noise, and goes on long enough to wake me up. (about 30 sec's then minute pause)

if i was say, to create something that put out 200db and deafen a theif for a few hours... i wouldn't want to get into too much trouble

But it would be worth it though , wouldn't it !!
I allways wondered why alarms weren't alot louder, maybe it is incase it goes off by accident when the owner was in the car ??

Jason

Our gaffer at the theatre I used to work at built the lighting box security system himself. The alarm on that was a 240V klaxon (spinning air raid type siren). I don't know about decibels but I went in there with another guy who failed to disarm the system properly before opening the door. My best description is it felt like waves of pain going through your head. I clamped my hands over my ears and hit the deck and let him turn the bastard off.

One of those in a car could be fairly effective. Even if people ignore car alarms in general, they might come out to find out what was making that bloody racket. And it sounds like an air raid siren rather than your normal alarm.

Perhaps a PA system playing "holy shit! free money! falling from the sky!" would be the best car alarm.

your average car alarm is useless these days because everyone ignores them, and they don't stop people nicking the cars anyway.

however, something so loud it'll stun a theif and immobilise them will be more effective.

unfortuntely, it'd need to be directional, don't wanna wake everyone up, and i'm not sure about the legalites volume wise

You sould be OK if the sound source is in the car then you will deafen the person in the car but not everybody in bed