Wouldn’t the concussion bust everyone’s eardrums?
The round that hit us was noisy, but occurred outside the vehicle. Obviously, a 2-stage warhead would have been a very different matter, but the concussion was probably actually more than would have been felt inside a fully-enclosed vehicle- at the time, I thought they were trying to take out the running gear and glanced a round into the ground. My surprise later when we found the quarter-sized hole burned in on one side and out on the other was matched only by my gratitude for not having been standing closer to where those holes had been burned through.
I had a CVC/ Tanker's commo helmet on at the time, which undoubtedly helped some in reducing the effect of the concussion/blast. But I was real interested in other things going on at the time, and it's quite likely that I would not have noticed a smallish nuke going iff had it been detonated in front of us.