""It's all very well saying 'If you don't like it leave', but if you've paid a lot of money and find it unbearable, what's the chance of getting your money back?""

I take your point Jim, and if a lot of people are complaining your chance of getting a refund would be quite good.

So, first, look around at the others in the venue.

If you are the only one suffering distress at the sound level, ask yourself whether it is you, or the army, that is out of step.

Whatever the answer, your suffering is real, so leaving would be a good option in either case.

Next time out, musicians' (or motor racing marshalls') earplugs are, as suggested above, a sensible precaution.