A new experimental sound-source:
… in 1987, a totally unexpected revolution took place: a new family of superconductors based on copper and oxygen smashed all records, taking the highest known superconducting temperatures up to a balmy −150C. BCS theory, which worked so well for simple, elemental superconductors, couldn’t explain the behaviour of these new materials. […] A paper published last week brings us a step closer to understanding how these new superconductors work. Physicists, including my old officemate Paul, used some of the biggest magnetic fields on Earth to try to work out what’s happening inside these materials. In fact, the pulsed magnets used burn through enough energy to melt a tonne of steel every second. […] … the mechanism that underlies this advanced physics apparatus for measuring materials in massive magnets is almost identical to a theremin. …
Audio at the main link.