Danny be sure to bring your own hearing protection, you may even want to put headphones over plugs. Depending on the field strength of the MRI machine, the SPLs can top 130dB. Its like being loaded into the center of a warp core and then hitting warp 9.
Interesting, but very loud!
"Additional studies measured acoustic noise generated by echo planar imaging (EPI) and fast spin echo sequences. Echo planar sequences tend to have extremely fast gradient switching times and high gradient amplitudes. Shellock et al. reported high levels of noise ranging from 114 to 115 dBA on two different high field strength (1.5-Tesla) MR systems tested when running EPI sequences with parameters chosen to represent “worst-case” protocols. At 3-Tesla, Hattori et al. recorded sound levels that ranged from 126 to 131 dB on a linear scale, recommending the use of both earplugs and headphones for ear protection relative to the use of 3-Tesla MR systems when certain pulse sequences are used."
http://www.mrisafety.com/safety_article.asp?subject=180I had a series of scans in a 1.5 Tesla machine last summer and I was glad that I didn't opt for the 3 Telsa ride.
Scotty