No, not any one of those things will mask the sound by itself.
But if you're taking intermitent shelling, firing your own weapon, with high-caliber artillery pounding away in the background, and someone cuts loose with a machine gun 20ft away, while one of your own tanks fires its main gun, you're probably not going to notice the rumbling of a few slowly moving tanks (if you're hauling bellybutton at 60mph, the dust trail will give you away) as they creep up to the jump-off point for an attack.
And the goal probably wouldn't be to reach your objective undetected (its a 60 ton tank for gods sake), but to remain undetected untill you get close enough that they can't stop you in time, or untill you shoot first.
Like I said, there would still be many uses, just not so many as if you weren't trying to hide a big 60 ton behemoth that sounds like the trump of doom as it rattles and clanks its way forward.
Enemy tanks wouldn't see you at all (at most, they'd just notice their range finder gives a closer reading than expected if they sweep it across you). You would be near completly invisible as long as you remain still.
