Sonic Wave (D20 Modern Feat)
From D&D Wiki
Sonic Wave [Power]
The character can create sound waves.
Benefit: When the character uses the Power (energy control sonic) to encase your hands in sonic energy the character may "throw" the sonic energy as a 30 ft. cone. Everyone in the area takes damage equal to the amount of damage based on the result of your Energy Control check and be knocked prone, a reflex save opposed by an Energy Control check can be made to reduce this damage by half and resist being knocked prone. This attack ends the effect on your hands.
Special: The origin of the cone is determined by the player when this feat is taken, this includes but is not limited to your voice, clapping your hands, or stomping your feet.