Yeah I tend to think it's somewhere in the middle. I go with starting at 75 dB, but use 5 dB as the halving.It's interesting they state:
Everyone quotes the OSHA guidelines as the gold standard for what is safe.
The World Health Organization (WHO) criteria is much more conservative:
75dbA - 8 hours
78dbA - 4 hours
81dbA - 2 hours
83dbA - 1 hour
I go to lots of shows and the only thing that ever made my tinnitus worse is when I had a BAD ear infection.
I'm always cautious with 30 dB reduction and stand in back. I also only go to licensed shows (105 dB limited in US at FoH).
My tinnitus had faded to almost zero pre infection. Post "spike" (11/1) it has started to show the same pattern again. Up and down. I really only hear it in bed these days but I'm OCD and it keeps me up a bit.