Given that every one of my 3,000 hours flying has been with the use of and aid of headsets, want more sound turn up the volume! In the EC120 you have to have a headset on to hear warnings etc, don't most of us wear a hearing aid all the time we fly?
The last few years it has been Bose and Lightspeed all with ANR, (not like the 1980's David Clark rabbit trap ear vice ones) all costing $2,000 or so. Are these not hearing aids?