The effect aligned with the popular assertion that the whistle was used in human sacrifice. Experts speculate that the sound could have been used to terrify the subject as well as onlookers.

The tragic flute. Scientists sent shivers down the internet's collective spine after recreating an ancient Aztec "death whistle" that's said to emit the "most terrifying sound in the world." ...

ANCIENT Aztec ‘death whistles’ have a strange ‘uncanny valley’-style effect on the human brain, new research has found. These clay instruments were often shaped like human s… ...

10 Surprising Reasons Movie Scenes Were Ruined 5. Composer John Barry Insisted Upon The Slide Whistle Sound Effect - The Man With The Golden Gun Eon Productions ...

A door bell camera captured the moment the "world's most terrifying sound" sent a dog owner running for their life as a spine-chilling whistle pierced the evening calm ...