The Aztec Death Whistle. If hell has a sound, I bet it sounds alot like the Aztec Death Whistle. The Aztec Death Whistle sounds like a shriek of death mixed with howling wind. It's so unnerving, that the significance of the horrifying sound of the Aztec Death Whistle has fascinated and perplexed scholars for years. I'm going to play the sound of the Aztec Death Whistle for you today.