When you go into an MRI room you hear this weird but very distinct sound from the liquid helium pumps keeping the giant superconducting magnets near absolute zero.
Then when it runs, the vibrations from the current being pushed through the gradient coils is significant enough that you need hearing protection.
It’s serious business in there. But it lets us see inside our bodies without incisions or ionizing radiation, so it’s also awesome. But jeez some people and their guns.