I'm afraid this is just a big red herring. All the relevant damaging noise reaches the cochlea via air conduction, ie your ear canal. Forget all that bone conduction rubbish unless you're parked beside a huge artillery piece.
Chris-NZ
(Clinical Audiologist)
Science is good. My earmuffs help to anchor my toupee when sitting at a bench next to a shooter with a braked magnum rifle!