Wtf does that matter?
They perform as suppressors, in some cases they act as a silencer by making them extremely quiet. In most cases they suppress the sound, so what's the point of your semantics based reply?
In almost all cases the firearm becomes "hearing safe" where one does not need earpro.
I actually own and employ suppressors. Folks who call them silencers are hollywood informed and not particularly experienced.
Either way the original claim is plain incorrect, no matter how many lems downvote.
edit: y'all downvoters are some dum ass ill-informed lembs (see what I did there, lol!)