Home security tips and recommendations

I've been considering having an alarm system installed but I am on the fence about their efficacy. My home around 10 years ago was burgled, despite the alarm going off. I was notified and the security company sent a patrol car to investigate but the burglar had already been through.

Having read reviews and testimony, it seems like many burglars go in for a quick grab of anything valuable. I don't see a conventional alarm being much use as a deterrent as they know they can steal and be gone before you or security comes along.

Is there an alarm that simply generates an extremely loud and high pitched sound that is above the pain threshold? Something 120 dB ++ that would physically force them to leave?

/r/perth Thread