The Aztec skull whistle produces a shrill, screaming sound. A study shows that these whistles have a disturbing effect on the human brain. The Aztecs may have deliberately used this effect in ...

During ritual ceremonies, the ancient Aztec civilization used a “death whistle” — a haunting instrument shaped like a human skull. Its eerie, high-pitched scream is not just a product of its unique ...

It's been described as the 'scariest sound in the world' – somewhere between a spooky gust of whistling wind and 'the scream of a thousand corpses'. Now, experts have recreated the noise of the Aztec ...