1) When I cast a spell it doesn't sound so loud (I dunno bout you guys but say when I cast muffle or a flesh spell it makes a massive noise when the effect is applied, I figured the perk would quieten it down a bit
2) When I fire say a frenzy spell at a group of say 4 bandits and it hits one of them they wouldn't instantly know where I was and all come running/searching for me ?
What does the perk do exactly?