Acoustic Noise

Acoustic noise is created when current is passed through the gradient coils during image acquisition. Although these levels are anticipated to be well below the OSHA standards for a hearing loss prevention program must be started (80 dB over 8 hours or half the exposure time for each additional 5 dB exposure), it can cause some reversible and irreversible effects. These effects include communication interference, patient annoyance, transient hearing loss and, in those who are susceptible to hearing impairment, and/or permanent hearing loss. All patients are provided earplugs and in addition when applicable, headphones, with a total minimum suppression rating of 30 db or greater. No earplugs, no scan. 

Employee Acoustic Safety

UCSF considers acoustic MR safety for UCSF Health professionals a high priority. Healthcare professionals and MR personnel who must enter the magnet room will be provided ear plugs to protect their hearing when appropriate.