[conservatism_IS_compassion]

there’s no more intimidating sound, from man or nature, than the distinctive ‘racking’ of a pump-action shotgun...

Makes it much more likely to be able to defuse a situation without having to fire a shot....

. . . which makes me wonder if I don't want an actuator mechanism which can be concealed somewhere and triggered remotely to produce that sound.

Intruder hears sound, cannot locate the source, loses confidence in his ability to control the tactical situation, departs.

[Eye of Unk]

Thats easy, off the shelf sound recorders can be bought almost anywhere, add an amplifier and a speaker, connect to a proximity yard light sensor.

Another good sound is the one that you hear before a landmine goes off.

[Uncle Ike]

” Intruder hears sound, cannot locate the source, loses confidence in his ability to control the tactical situation, departs. “

Exactly —

In a ‘home defense’ situation, you’re most likely to encounter sneak-thieves, intent on taking your possessions undetected...

Unless your desired intent is to have a firefight in your home, then driving them off is the preferable outcome...

[TheRightGuy]

Intruder hears sound, cannot locate the source, loses confidence in his ability to control his rectum.