I am a physician who has had several MRIs, one after my own tinnitus started. I uses moulded earplugs and was fine. MRI is a safe procedure. Those of you worried about the sound levels that can be produced should ask the technician what the maximum decibel level is is for that machine and take apppropriate precautions. If still concerned, ask your medical specialist if a CT Scan would be an alternative - you are exposed to X-rays but it is essentially a silent process.