Quarefella,
Although I am not an aviator, I use these moulded type ear inserts for noise protection.
They are very comfortable, and much less of a hassle than normal shell type ear defenders and do not affect normal conversational hearing.
I know that the bone type mic technology is cutting edge, it is the same systen that the F1 drivers use to communicate with the pits. Hope that helps.
Btw any noise over 85dBA can, over a prolonged period, cause long term hearing damage.
Toothpic