Quote Originally Posted by dove View Post
I've occasionally fantasized about running active earplugs under active earmuffs or figuring out how to hook up a pair of custom IEMs to the microphones on Sordins/DEHPs in order to get the benefits of both doubling up and the "hear the good things clearly" concept behind active ear protection.
Such a system is currently available, albeit only in a very niche platform. Meet the Ops-Core RAC: http://teaheadsets.com/index.php/rac.html