system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why MRI machines make so much noise.

My boyfriend got an MRI of his brain the other day and will not stop talking about all the noises it made and has been obsessing over the “Why” of it. Can someone ELI5 so I can give him the answer he so desperately needs?
gpt
because on the inside of the machine, the large metal coils are vibrating when electricity passes through rapidly, creating a magnetic field, which causes the banging noise.  the louder the bang, the more the vibration, the more detailed the scan.