Ranging from a threatening hiss to a blood-curdling scream, the sound of the Aztec death whistle is as creepy as the ...

Swiss and Norwegian neuroscientists have discovered that the ancient Aztec death whistle — often credited with emitting the scariest sound on earth — still terrifies people today due to a primal fear ...

More ghostly goings-on have been witnessed at the derelict Rosslynlee Hospital that used to treat psychiatric patients but has been closed since 2011 and lies abandoned ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? The Aztec death whistle is a mesoamerican instrument designed to imitate a human ...

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 ...

A team of urban explorers were left "shook" after hearing a creepy "human whistle" inside an abandoned Scots psychiatric hospital. The group entered Rosslynlee Hospital near Roslin, which has been ...

Whistle notes are a human voice’s highest notes, with a sharp, flute-like sound distinct from regular singing. These super high pitches, even higher than the soprano range, are made by the vocal ...