Anyone can download a Db meter app for their smartphone. Some only go to 100db , and are useless. Others claim 130db. Although accuracy is iffy. If its free? Download it and flood the internet. A MAX function is extremely useful. Measures peak volume and stores that reading.
I chose a semi-professional one, as I have other uses. (I'm the guitar player that doesn't want to turn down.lol) Those will accurately read up to 130db. Jet engine. Over that is the threshold of pain.
I fully believe the dome can be over 130db. If the University ever did it, they'd have to spend as much as $69.