AI Field of view and sense of hearing

Hi guys, is there a way to implement in Unity a Field of view and a sense of hearing for AI the way it is implemented in this vid:

Yep all of these are very possible.
By writing code obviously

Visual fov as he said is raycasting and sound is just a varying sphere size depending on volume.

Exactly, the guy tells you exactly what he did, wich just gave me some cool ideas.