If I recall correctly the maximum Noise Reduction Rating (NRR) for earplugs and earmuffs is around 30db. You can combine the two for a slight increase in hearing protection but you still hit a limit because of bone vibration.
Is there PPE out there to go even further beyond this? Where would it be commonly used?
Sorry, you’re right, i was being too harsh. when i responded i thought you weren’t speaking in good faith, but i must’ve misinterpreted.