| CPC H04S 7/304 (2013.01) [H04R 5/033 (2013.01); H04S 3/008 (2013.01); H04S 7/303 (2013.01); H04S 2400/01 (2013.01); H04S 2400/11 (2013.01); H04S 2420/01 (2013.01)] | 20 Claims | 

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               1. A method comprising: 
            dividing a space around a user wearing a head mounted display (HMD) into three-dimensional (3D) zones that include zones of physical objects where the user is located and zones of empty space where the user is located; 
                determining different room impulse responses (RIRs) for the 3D zones; 
                displaying, with a display of the HMD worn on a head of the user, a virtual image on one of the physical objects where the user is located; and 
                processing, by a processor in the HMD worn on the head of the user, sound with the RIRs such that the sound originates as binaural sound with a sound localization point (SLP) at the virtual image located on the one of the physical objects where the user is located. 
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