Why do large crowds sound more like a garbled roar or crackle as opposed to screaming and actual cheering

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I know that at concerts when a large crowd cheers loudly it’s heard more as a distorted roar but i’m curious as to why this happens. I’ve been to concerts where it’s a scream (eg when taylor swift came on stage) but I still heard it as a loud, overpowering roar and crackle. Why does this happen?

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Go up to a piano and play a bunch of random notes. It sounds discordant. Because when a group of people shout they aren’t emitting a perfect note – everyone’s voice is different and the pitch of their shout creates dissonance. With louder sounds your ear can also experience sound distortion which means you’re less able to discern pitch correctly.

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