In this case, it’s 192 of them, arranged on long PCBs working as the spokes of a wall-art wheel. The secret sauce isn’t a sophisticated microphone, but a whole bunch of really simple ones.
It seems that discovered how to make that particular trick a reality, but with audio instead of video. Remember the scene from Blade Runner, where Deckard puts a photograph into a Photo Inspector? The virtual camera can pan and move around the captured scene, pulling out impossible details.
