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Sonic Orb

(Tome and Blood: A Guidebook to Wizards and Sorcerers)

Evocation [Sonic]
Level: Sorcerer 4, Wizard 4,
Components:

As acid orb, except sonic orb deals sonic damage.
A creature struck directly takes the orb's damage and is deafened for 1 round.
A deafened creature cannot hear, suffers a -4 penalty to initiative checks, and has a 20% chance of spell failure when casting spells with verbal components.
The creature cannot make Listen checks.
A successful Fortitude save reduces damage by half and negates the deafening effect.