Yesterday, I played Kled for the first time and found myself wondering if enemies were aware when I activated his ultimate/R (Chaaaaaaaarge!!!). It makes a lot of noise on the players end. I know Sivir's ultimate makes a noise on players end and also enemies end and am curious if this might be the same. Similarly, there are spells where a visual effect is present when a spell is cast and incoming (think Xerath). Does the enemy have any warning it's coming?
(patch 6.17 if it matters)