My hearing is badly damaged. Despite wearing ear plug and headphones or even the noise-cancelling headphones worn by airplane pilots, I seem to be suffering hearing loss from plane travel. Since hearing is also tested through bone transduction, I am hopeful that protecting the rest of my skull from noise might allow me to travel. Any suggestions for finding or trying to make a sound proof helmet? I am not handy, but I am desperate enough to become handy. Thank-you!