Alarms in general are pretty rubbish anyway to be honest.

Back when they were first introduced, as soon as anyone heard one heads turned, people came running - there was intrest in it and why it was going off.

Then people got bored of hearing them and all that happens these days is people "tut" and say "oh shut up" and ignore them. In workplaces when an alarm goes off people just sit and wonder who it was and go about their work moaning about the "bloody noise".

All they're good for these days is bringing the price of insurance down really.