Back in May 2015 Patently Apple posted a patent report titled "Apple Files a European Patent that Advances their Work on an Exciting Video Headset Device." Today, the U.S. Patent and Trademark Office officially granted Apple this patent titled "Adjusting media display in a personal display system based on perspective."[...]
In some embodiments, surround sound (e.g., Dolby Digital, DVD-Audio, Super Audio CD, MP3 Sound, and theatrical film 5.1 surround sound formats, etc.) integrated in the personal display device may be adjusted based on the user's selected viewing position or any other configuration. As a result, a user sitting in the front-center of the movie theater may hear sounds differently than a user sitting in the back left side or middle-center of the theater. As another example, audio may be louder if a user zooms in to the displayed media, and softer if the user zooms out of the displayed media. Persons skilled in the art will appreciate that any suitable type of audio adjustments, such as, for example, 3D sound effects or room equalization, can be made when a user selects different viewing positions in a theater.[...]
Full article:
www.patentlyapple.com/patently-apple/2018/01/apple-wins-patent-for-a-video-headset-that-could-change-perspective-when-viewing-live-events-such-as-concerts-sports.html