BANG!
That's the noise of me detonating an explosive charge directly inside your ear hole.
Quite why I would do such a thing, I am unsure. I've probably never even met you!
There is one thing I am sure of, though: that such an explosion would be extremely loud and uncomfortable for you.
I asked a scientist to confirm this, and he said "Yes".
However, if you can believe it, it would not be the loudest noise!
The loudest noise is an aeroplane crashing into a massive tower of plates.
WOW!