Deafness
This spell is a part of the Tinnitus spell chain and can be found in the Tinnitus rune stone.
This spell prevents any sound whatsoever except for the sounds caused by this spell from reaching the target, rendering the target deaf. This gives the target a penalty of 2 to Perceive and increases any perceive check difficulty up a level. Therefore it if was a normal difficulty it becomes a hard difficulty, for example.