US Patent 8170222 Augmented reality enhanced audio

A device and method for providing augmented reality enhanced audio. The device is portable and may include a location processing module capable of receiving location information and determining a location of the device in an environment, an orientation processing module capable of determining an orientation of the device at the location, a processor capable of modifying audio content based on the location of the device in the environment and the orientation of the device at the location, and an audio output device capable of outputting the modified audio content. The orientation of the device includes an azimuth and an elevation of the device.