What Is This Thing

[tyrefryer]

I found this some time ago under the dash board in my 97 VT Calais and back then i thort it looked odd but didnt think much of it. I saw it again today n gave it a flick and it lit up. i think it lights up when it detects sound and only when the car is off.

[VrWagz1]

Some sort of alien tracking device??

[Philthy]

Looks like a microphone to me. They are watching you...always watching

[lil_oneblue]

thats part of an alarm system. its the sensor that senses when glass is broken.

[Farlig]

thats part of an alarm system. its the sensor that senses when glass is broken.

yep glass break sensor.

[tyrefryer]

woah thats quite interesting. when i looked at it i thort, hey whys this thing picking up sound, and it looked put in dodgy cos the cable tie.

I just wonder how effective it is, does it just detect the sound from a window being broken or something. i think theres also a small red light running from it up into the plastic next to the steering wheel but i havent seen that light up at all.

[azkwazere]

yeah either a glass break sensor or a shock sensor... eiother one...

think glass emits a frequency when it breaks... it picks that up... donno, google it..

aZk.

[Philthy]

Basically, glass break sensors work by recognizing the sound/shockwave made by the glass of your windows breaking. Then an alarm sounds.
Home Security News: Glass Break Sensor Information

Taken in reference to home alarm systems but I would assume car ones work the same

[lil_oneblue]

its defently a glass breaker sensor as i said before.

if you get a coin. and tap it on your window your alarm should go off. tapping a coin on the window puts off the same sound. if it does not go off you should move it closer to the windows.

[Farlig]

lock and arm your car with you siting inside, and then jingle your keys the glass break should light and trigger the alarm. or what lil_oneblue says tap keys/coins on window.