The best example of this principle that I can think of is the “Mosquito”. It basically is a device that emits a high-frequency noise that most people over 20 can’t hear that is sold to “move along unwanted gatherings of youths”.
Most people over 20 can’t hear it and kids turned that around by using it as a ringtone at school that teachers couldn’t hear. Of course some adults like me can hear it just fine (and wish they didn’t). Unlike Acci, I have never been subjected to gunfire, however I have had an 18 inch subwoofer in the back of my car for going on 10 years now and my hearing is still above average. I do have rather large ears which I believe to be somewhat to my advantage (like little satellite dishes…).
I’d imagine the same thing could exist for a low-frequency sound, but at a certain point it would change from a sound that was heard to a vibration that was felt, I wonder if it might be teetering on that edge thus not always be recordable as audio but might be picked up on an accurate-enough seismographic device.
It’s a curiosity, but if I were them I would have sold my house and moved before publicly decreasing my property value to nil…