Edgar Choueiri, a professor of mechanical and aerospace engineering at Princeton University, has developed a way to play true three-dimensional sound recordings over regular loudspeakers, such as those found in televisions and computer laptops.
The technique may one day be used to allow 3D televisions to produce lifelike sound and to help people with certain types of hearing impairments locate noises. Segments of the video above incorporate Choueri's 3D filter to demonstrate the phenomenon.
The filter is designed to work with loudspeakers - not headphones - and can be experienced through standard computer speakers. (Make sure the right and left speakers are on the correct sides.)