Death whistle: experts have recreated the world's scariest sound. Video

Experts have recently recreated the sound of the Aztec death whistle by creating a new version of the legendary instrument using a 3D printer. From the howl of a wolf to a blood-curdling scream, there are sounds that can give even the most adventurous horror movie fan the chills.

But these eerie sounds pale in comparison to one sound that is called "the scariest in the world." According to experts, the Aztec death whistle is a cross between an eerie gust of whistling wind and "the scream of a thousand corpses," MailOnline writes.

This sound was used by the Aztecs during sacrificial ceremonies, honoring the wind god Ehecatl.

Experts have created their new whistles based on the design of the original skull-shaped whistle that was found with a skeleton in Mexico in the late 1990s. The video of the 3D-printed whistle was published by Action Lab, an educational YouTube channel dedicated to conducting scientific experiments. So, do you have the courage to listen to it?

"It was considered the most terrifying sound in the world. Believe it or not, it's not a human scream. The sound of a death whistle strikes fear into your heart," says host James Orgill.

Back in 1999, during the excavations of an Aztec temple in Mexico City, an original Aztec death whistle was found in the hand of a skeleton.

"At first, the archaeologists thought it must be some kind of toy, so they didn't think much of it. It was only 15 years later, for some reason, that a scientist blew into a hole in the top, and this is the sound that came out. It was a startling discovery because it sounded like a human scream," Orgill says in the video.

Although the exact purpose of the posthumous whistle is lost to history, there are several leading theories. Some experts believe that the Aztecs probably used the sound to help people's souls follow them to the afterlife when they were sacrificed. Perhaps the original skeleton was buried with the device as a defense to scare away evil spirits as they leave this world.

"But whistles could also be used by warriors to 'strike fear into the hearts of enemies' at the beginning of a battle," Orrill argues.

According to the expert, the whistle imitates the shape of the human larynx. When the user blows into it, the air is divided into two parts, creating oscillating sound waves that circulate around a large chamber before exiting the second opening. Some whistles have a ball inside the chamber, often made of cork, which bounces and further distorts the sound.

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