Virtualized Surround Sound over Headphones
Virtualized surround sound allows users who are wearing headphones to distinguish sound from front to back as well as from side to side. This is done by transmitting spatial cues that help the brain localize the sounds and integrate them into a sound field. This has the effect of making the sound feel like it transcends the headphones, creating an "outside-the-head" listening experience. This effect is achieved by using an advanced technology called Head Related Transfer Functions (HRTF). HRTF generates acoustic cues that are based on the shape of the human head. These cues not only help listeners to locate the direction and source of sound but it also enhances the type of acoustic environment that is surrounding the listener.