Sonic Resonance
Source
Core Rulebook pg. 112
When you hit a creature within 30 feet of you using a weapon in the sonic category, the sonic energy continues to resonate within that creature, giving it the flat-footed condition for 1 round. If you hit multiple creatures at the same time (such as with an automatic, blast, or explode weapon), only the creature nearest to you or to the center of the explosion (your choice if multiple creatures are equidistant) is affected.
Dragonscript
ID
0196f0f2499220cacb4fa67f