Whisper Elf
Source Pathfinder Core Rulebook
Your ears are finely tuned, able to detect even the slightest whispers of sound.
As long as you can hear normally, you can use the Seek action to sense Undetected creatures in a 60-foot cone instead of a 30-foot cone.
You also gain a +2 circumstance bonus to locate undetected creatures that you could hear within 30 feet with a seek action.