LAN

what happens if in a 1v1 someone shouts out the position of a player?

nothing

noise cancelling headphones

in the crowd you mean? they wear over ear headphones that block out noise on top of in ear headphones

that's why they have noise cancelling headphones

they cant hear the audience. They have 2 audio devices. Inne Ear Monitors which provide game audio and outer headphones which give a certain white noise frequency which blocks ambient noise

Lol... I remember my first LAN

They use their own earphones under the noise canceling head set. Don't think the crowd is loud enough. You would need the entire 3k-ish audience whistling etc, like what happens I cs.