
Originally Posted by
JimmyC
I guess the alarm isn't much protection for people inside the house if they can't hear it.....

Hm. Good situational question:
Imagine you were home alone, with loud music, lost focus, munchies, perhaps a companion ... and someone broke in? How would you know? Could you respond in time? What would you do, if surprised in the middle of your own living room? Would you be prepared to defend? If not, what should be changed/enhanced to allow for a proper defense?
Makes you think hard about the simple things. Such as the point mentioned, that perimeter alarms aren't worth the bother if they cannot be heard. Though, a simple wiring-in of a horn or two should cure that problem.