I'm really curious if enemies can hear us swing our melee. There was this close round and my teammate started swinging their knife around as we approached A site in Bind which should have been unexpected since we faked B. Then I swear, without any other sounds from us, 2 enemies just swung together ready to shoot as if they knew we were there when my teammate was swinging their melee. Now I'm really curious if that was just luck from them or if they played off that sound cue.

EDIT: Thanks to everyone who chimed in! I hope someone who has the same question down the line stumbles upon this post.