Hear the Unseen

 
Prerequisite(s): Listen 5+ ranks, Blind Fighting, Base Attack Bonus 2+
 
Benefit: As a move action that does not invoke an attack of opportunity, you can attempt a DC25 listen check. If successful, you can pinpoint the location of all foes within 30’, as long as you have line of effect to them. The benefit does not eliminate the normal miss chance for foes with concealment but ensures that you target the correct square. If you are deafened or silenced this feat does not work. If an invisible or hidden opponent is attempting to move silently, your listen check is opposed by your opponents move silently check + 15. this feat does not work against perfectly silent creatures like incorporeal.
 
Source: Complete Adventurer