07 Elantra alrm goes off for no reason
 

This started about a month ago and is steadily getting worse. While standing in the garage with the engine shut off the alarm will go off randomly. I don't think this is the usual problem with the hood switch because the car is unlocked and the alarm is NOT armed. It's like a panic alarm, because the car remains unlocked.

Anyone have any ideas, or at least where I can locate the alarm and disable it?