I dunno - I think people adapt and will sooner work better as units. A tank commander and his crew communicate, only the tanker with radio, the rest just voice, infantry shouting across the battlefield, enemy coordinating in german or whatever the enemy is at that moment, but again only as far as their voice carry
For a sniper or lone wolf, the battlefield will be very silent - And for most, it will only be those around you you will hear.
Squad captains well get intel from other squad captains, tankers, aircraft and artillery, but that will only help him make more tactical decisions - Besides, those, all will be hanky-dorey really