Japanese FueTrek licenses technology from Matsushita and combines it with their chip technology to squeeze 3D sound out of the tiny mobile phone speakers.
The FueTrek chips can alter the frequency and strength of the sound signals to generate 3-D sounds from the mobile phone speaker.
Game developers can leverage FueTrec's technology to create realistic sound effects.
More details in Press-Release.
Speaking of 3D Sound take a look at the U-Beat 3D VibroWoofer and the NEC 3D Notebook SoundVu