Check out this page.....
They have personal alarms that have a 130 db siren. How loud is 130db?
They are cheap...8 to 14 bucks. You could put two sleds together, tuck
the alarm part in one suspension and clip the cord on to the other sled,
if either sled moves, the pin is pulled. Neat!
Any seen these or heard how loud they are?
Remove the ** to respond.