Whistle is the outlier because it's produced by blowing air through pursed lips creating a specific tone, while the others (scream, shout, talk, hum, lecture) are all primarily speech-based vocalizations produced using the vocal cords and mouth shapes for language or expression. Screaming, shouting, talking, and lecturing all involve articulated speech. Humming uses the vocal cords but without opening the mouth, but it's still a laryngeal sound like the others.