The spell seems quite clear: if you are not the target of the spell, you do not get a saving throw, even if you happen to be in the area of effect.
Kodam said:
Situation: Enemy (E) has won Init against Player (P).
Round 1: E acts as it pleases him (-> E ist sculpting the fight) ; P casts silence
Round 2: E HAS to dispel the silence (assuming he can't safely move out which is very likely the case in a dungeon); now P can act as it pleases him! (-> now P's in charge!)
This is highly situationally dependent. (I'm kinda surprised we're even discussing it.) Often, during the beginning rounds of combat, the enemy mage has lots of room to manuever.....that
silence spell will make him move, but won't make him waste his entire round dealing with the problem. Since the enemy wizard can move, then cast, that's exactly what he'll do.
If, OTOH, the wizard is restricted in his movement, like surrounded by goons or prtections...then this is an excellent idea.
Moving out of the silence + realizing that you're out = one round worth of actions...
Wow.
That's not only very harsh, but factually untrue. (A straw man, even.) As long as you have hearing, you are instantly aware there is no sound were you are...there's a battle going on, after all, so you move a short distance until you can hear again. No
Listen check is required.
So: Move action (out of silence radius) => Standard action (cast spell)