Wall Against Noise

This spell creates a thin wall of air that prevents all sound and sound-based attacks from passing through it. The operative word is through; a sound made on one side of the wall is still audible and effective on that side (and even within the wall itself).

The wall against noise blocks any sound-based attack (such as a harpy's song or a power word); anyone on the opposite side is immune to the attack. Those on the same side as the attacker or somehow within the wall are still vulnerable.

An attack that partially contacts the wall, or over laps the end of it, only shields those who are directly behind the wall. A spell such as fireball, which has a verbal component but isn't sound based, is not stopped by the wall. The caster can still summon the energies needed by speaking on one side of the wall, and then send the spell through it. Magical devices activated by words are also unaffected by the wall against noise. The wall still blocks sound, however. Hence, a fireball can penetrate it and explode on the far side, but the explosion isn't audible on the side from which it was cast.

A wall against noise is most commonly used to secure an entrance against listening ears, as well as to protect the sultan's chambers and harem from unwanted disturbances. It also negates errant sounds caused by the sand whisper spell, and blocks the spell clairaudience. In old tales, great cities ruled by marids used walls against noise to protect their citadels from the effects of horns of blasting and drums of panic.

The material component of this spell is a white feather, blown into the air. The feather disintegrates as it drifts downward, activating the spell.