Deafened
You can’t hear. You take a -4 penalty to initiative checks and opposed Perception checks, and you automatically fail Perception checks based on sound. Characters who remain deafened for a long time grow accustomed to these drawbacks and can overcome some of them.
Source
Core Rulebook pg. 275
Dragonscript
Effect
bonus -4 to [character.initiative] as misc; append '-4 penalty to opposed Perception checks' to character.situationSpecificBonuses;