Unreal Engine AI with Behavior Trees | Unreal Engine

Hello in the unreal video on youtube https://www.youtube.com/watch?v=iY1jnFvHgbE&t=525s 12:14 the tutor goes into the text file

And he adds these two line in the defaultgame

My question is: if you want the AI to have other elements, such as hearing, would you need to edit the DefaultGame.ini file again with

[/Script/AIModule.AISense_Hearing]  
bAutoRegisterAllPawnsAsSources=false

to get AI hearing working?

For example, if you make your AI generate footsteps, would that cause them to start chasing each other?

Sorry if this is a silly question.