Inside the scanner are coils of metallic wire. When electricity passes through the coils, a magnetic field is created and the coils vibrate. The sound the MRI makes is the metal coils vibrating and banging together inside the machine, creating a very strong magnetic field. The sound may reach up to 100 Decibels, so patients are required to use ear protection. We also have a sound system so the patient may enjoy music through headphones while being scanned.