There is a difference between a SILENCER and a SUPRESSOR. If it a supersonic round, all you can do is surpress it. I hate when people mistake a silencer with a surpressor!
Wait, what? Mistake a silencer with a suppressor? They are the same thing!
The inventor of the darn things called them "silencers." People have been using the term SILENCER since day one.
Get over it.
And what does the round being supersonic have to do with the report of the gun? That is what a silencer effects, it has nothing to do with noise produced by the bullet's flight or impact.