I once had a silencer and wanted to mount it on my .22 magnum, but the gunsmith told me that since it ws supersonic, it wouldn't work.
Tried some ptarmigan sniping with a normal .22 long (subsonic) with a silencer, it was a little "pop" and the click of the bolt, then you really could hear the bullet whizzing.
Wonder wat a pepsi will add to this thing