The Aztec Death Whistle. If hell has a sound, I bet it sounds a lot like the Aztec Death Whistle. The Aztec Death Whistle sounds like a shriek of death mixed with howling wind. It's so unnerving, that ...

An ancient Aztec Death Whistle comes with one of the "most terrifying" sounds in the world, according to experts. The item was developed in Mexico when the Mayans running the land had to protect ...