eDimensional AudioFX Force Feedback Gaming Headset
 

The idea of force feedback has been around for years and has been used extensively in game controllers such as game pads, joysticks, and steering wheels... A bass speaker in the headphones is used to vibrate in synchronization with sounds such as bombs going off, gun fire, a car hitting a wall, and most other loud noises you experience in gaming.

URL: http://www.bigbruin.com/reviews05/audiofx?file=1