As someone who suffers from tinnitus and hearing loss. I have to wear ear plugs to the games because of the music noise. Even with the plugs in I could tell it was obscenely loud. During the Greatest Showman I measured on my phone up to 87 decibles and that's me sitting towards the front on the stand so God knows what the sound levels were for people at the back nearer to the speakers
Just so you know anything measuring above 85dB is considered a risk as it can cause permanent damage to the hair cells in the inner ear, leading to having hearing loss.