We were right all along.
http://www.huffingtonpost.com/2014/09/12/sound-atom-captured_n_5810124.html
What does an atom sound like? Apparently it’s a “D-note.”
So, which atom do I use if I want to play a tune I know in G on the D whistle but my mate plays in F on a Bb trumpet?
That sound was a “D-note” about 20 octaves above the highest note on the piano
No prob on the flute with a trained embouchure. Besides, doesn’t Gen make those tiny super high whistles?
What’s an “artificial atom”? 
They don’t mean an artificial atom (the kind with the big atomic numbers made in accelerators). They mean an atom in a highly excited state – they note that the atom is 0.01 mm in diameter, which is about 4-5 orders of magnitude larger than it is in its ground state. It’s put in this state by a laser at a very particular wavelength. It needs to be excited like this in order to have vibrations that are at an accessible frequency. (I wouldn’t even call it an artificial state, since these sorts of atoms are present in nebulae in space.) The only reason that it sounds a D is that it’s this type of atom (I suspect sodium) in this particular excited state.
Yikes !
Is it stable ? How long does it last in that state ?
Hmmm… does it revert to ground state if the excitation is removed ?
I wonder what the orbitals look like . . .