Deafening Song( Epic Level Handbook, p. 52)
Your bardic music deafens those nearby.
Perform 24 ranks, bardic music class feature,
Hindering Song (ELH) ,
You can use song or poetics to temporarily deafen all enemies within a 30-foot spread from you. A successful Fortitude save (DC 10 + 1/2 your class level + your Charisma modifier) negates the effect. The deafening effect lasts for as long as you continue the deafening song. You can choose to exclude any characters from this effect (usually your allies). You may sing, play, or recite a deafening song while taking other mundane actions, but not magical ones (see the bard's inspire courage ability for more details). You may keep up the deafening song for a maximum of 10 rounds. Using the deafening song counts as one of your uses of song or poetics for the day.