When I was first tested and found to be at 120db and below, they put me into the little booth, put headphones on and turned them full blast. Turned my chair with my back to the window and turned all mirrors away from me. Then (this they explained to me afterwards) they turned their microphone full blast and popped a punch-ball in the microphone. People heard it up to 3 testing booths down, but I never flinched. There was someone in the room with me just watching me to see.
Right now, I live on the flight path to an airport (runway is 1 mile away) and while the planes coming in to land will rattle the windows and such, I will feel the ground vibrate, but get no other sensation until I see the plane.
