The noise may have also represented the Aztec wind god Ehecatl or the god of death, Mictlantecuhtli. There have also been claims that the whistles were used during warfare to strike fear into the ...

If hell had a sound, it would be the Aztec Death Whistle—a chilling shriek ... offering their still-beating hearts to the gods before tossing their bodies down the steps of Templo Mayor.

The story begins with the Aztec God of death and lightning, the Xolotl. As legends have it, he was a monstrous dog that guarded the sun god and ushered souls to the underworld every night.