Slight sound issue fixed in batch 2 of iPad Pro gen 2?

[Kal-037]

So it isn’t terrible or even that bad... but I’ve heard some say their iPad has slight vibration happening.
My iPad Pro has a little of it, but then again, my iPhone X, iPad Pro 9.7” and iPad mini have it too with certain YT videos or deep sounding voices, this happened with iTunes so I got concerned.
*update An Apple friend... said it’s a regular occurrence... so I guess never mind about this thread. Sorry Mods.