Presumably this could be used to block out specific voices/sounds. There's an episode of the sci-fi show Black Mirror (White Christmas), where a person is conv

Presumably this could be used to block out specific voices/sounds. There's an episode of the sci-fi show Black Mirror (White Christmas), where a person is convicted of some hideous crime and permanently blocked/made invisible and inaudible from everyone (the entire population has embedded audio/video processing enhancements by then). You can imagine future headphones where you could block out the guy in your office with the annoying laugh our download 'blocks' from the headphone appstore - no more Rick Astley or the politician you don't like etc.