Here and there, two beams intersect, and through your headphones, two audio samples blend. As you step away from a light source, the voice in your headphones – an airman’s memoir, instructions to ground staff, a loved one’s letter, a child’s recollections – slowly fade.
It wasn’t until they were testing their system that Malikides came across the pre-history of this “li-fi” tech. Alexander Graham Bell invented it, using sunlight and a deformable mirror to send sound information across space.
Visiting IWM Duxford for New Scientist, 5 July 2017. The artist Nick Ryan showed me round his new sound sculpture, DX17.