Whistles shaped like skulls were used to create the sound of screams by the Aztecs.

Kenna and Stephanie learn to play an Aztec "death whistle" before battling giant "Red Monsters" discovered by the James Webb ...

But in the forests of central Mexico, a single note from an Aztec whistle didn’t always indicate celebration — it meant death ...

The Aztec Death Whistle. If hell has a sound, I bet it sounds a lot like the Aztec Death Whistle. The Aztec Death Whistle ...