Noise Filter
(Illusion)

Range:  10 yards per level
Components:  S, M
Duration:  1 round per level
Casting Time:  2
Area of Effect:  5-foot per level radius
Saving Throw:  Special

All creatures within the area effect at the time of casting will have their hearing muted - they will not hear anything unless they have some other confirmation of its existence. Thus, you can only hear people speak if you can see their face or know precisely what they will say; background noise will continue if you know it should be there but sudden noises from the next room will not be heard, etc. Once a creature notices or becomes suspicious of the effect (by turning around and seeing a large pile of broken crockery they did not hear break, for example), it will automatically be dispelled with respect to that creature. The material component is a pair of blinders.

