With a gesture, you muffle sound around the target, making it unable to yell or otherwise make loud noises. This does not affect spellcasting by the target. The target can still use sonic effects, but the DC of these effects decreases by 2. The target gains a +2 bonus on saving throws against sonic effects. The target gains a +4 circumstance bonus on Stealth checks.
Pathfinder Roleplaying Game Ultimate Magic. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.