Hello, the fact is that when a predator teases players, the voice should be distorted and low in timbre, and in the game the voice is normal, dub the voices, otherwise it just sounds disgusting.
predator voice - teasing players
If you have thermal activated, you can kinda hear the distortion in the background. But for the Fireteam it doesn’t need to be distorted.
Watch the movie Predator 2 when a policeman found a piece of metal stuck in the ventilation, and on the train when there was a shootout.