Sand whisper

Sand whisper was a spell used by wizards in Anauroch. It was very rare outside Anauroch.

Effects
When cast, the spell created a small area of silence around a target creature or item. Any sound emitted by the target was transmitted to distant and random locations up to 24 miles (39 kilometers) distant. Additionally, if the target creature was attacked by a creature whose primary weapon were noise-based, such as a banshee, their attack was also transmitted. The spell did not prevent a targeted creature from speaking vocal components of a spell or words of activation for a magical item.

Components
In addition to verbal and somatic components, the spell had a material component. The caster sprinkled two handfuls of sand on the target during casting.