Is there a noise canceling Aviation headset that that allows and or amplifies ambient voices in the cockpit without using the intercom like hearing protection headsets? If not Bose any other manufacturers?
The trouble with amplifying ambient noise for voices, is that it will amplify ambient noise for everything else as well. I had that issue with the QC20s "aware mode". It was fine if I was ordering a coffee on the street, but in an aircraft it let too much of the engine noise in.
I havent used the A20s much, but from my experience they are tuned differently to their other noise cancelling headphones. They block out more of that constant noise, but someone sitting next to you should still get through.