I watched this video out of curiosity and wow, I am completely taken about how eerie this “Death Whistle” sounds. It seriously sounds like someone screaming in pain. The editor of the video also recreates an Aztec march to see what 100 Death Whistles would sound like. You have to check it out. It’s really, really creepy. 
This Man Demonstrates The Aztec ‘Death Whistle’ And It Is Terrifying
By
Devon Hartman,
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