Observant

D&D 2014 feat: Observant. Source: Player's Handbook (2014). category Feat Quick to notice details of your environment, you gain the following benefits: If you can see a creature's mouth while it is speaking a language you understand, you can interpret what it's saying by reading its lips. You have a +5 bonus to your passive Wisdom (Perception) and passive Intelligence (Investigation) scores.

Source: Player's Handbook (2014), p. 168 - Licenses and attribution