After seeing several of the investigators on television using “Geophone” devices to detect micro vibrations, I decided to look more into them and have played around with them all. The theory is this… these devices have built in seismic sensors that can pick up the most minute vibration in the surface they are sitting on.
You have probably seen these things as well. The TAPS team used one on “Ghost Hunters” that was a larger than you would want to carry around with you. The “Ghost Adventures Crew” used one that is sold by our good friends at Ghost Augustine.