Doorbell camera captures moment ‘world’s most terrifying sound’ sends dog owner fleeing for their life – and the source of the noise is haunting

The Nest Cam recently captured the “world's scariest sound” in the dead of night, sending a woman walking her dog running for her life.

The noise was reminiscent of someone screaming in pain, creating a “spine-chilling atmosphere at night” when heard from the person's backyard.

The harrowing footage was shared on X and has been viewed more than 19.5 million times.

Social media users said the terrifying sound may have come from the Aztec death whistle, an ancient instrument used by the civilization during sacrificial rituals about 700 years ago.

'Wow, that sound is chilling!' “Gives me goosebumps just listening,” one X user shared in the post.

“I'm going to grab a gun and call a priest,” another user wrote.

The video shows a woman walking her dog in the backyard in the middle of the night.

The surrounding area seemed silent before the screaming sound went off, so the woman took it away and went home.

Some X users suggested that the sound came from a fox or mountain lion, but others noted that the sounds were completely different.

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

Social media users said the terrifying sound was made by the Aztec death whistle used by the ancient civilization during sacrificial rituals about 700 years ago.

The video shows a woman walking her dog in the backyard in the middle of the night. The surrounding area seemed silent before the screaming sound went off, so the woman took it away and went home

Historians believe that the Aztecs may have used a skull-shaped whistle before killing them in ceremonies to honor the god of the wind, Icatl.

In the Aztec creation myth, two gods came together in a sacrificial fire and became the sun and the moon, but they remained stationary until Icatl breathed on them.

Although the artifact is rare, some people have shared that they own one on X.

“I have one, it's great.” “I scared a few people in the park late at night,” one user posted.

While another shared: “I have yet to use my pen outside at night, and I also live on a populated street with elderly people, and I don't want to cause a heart attack.”

“It sounds crazy though.”

Some experts believe that the Aztecs may have used noise to help people's souls travel to the afterlife when they were sacrificed.

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

In September, chemical engineer James J. Orgill recreated one of the haunting artifacts using a 3D printer.

Orgel modeled it on an Aztec death whistle found in 1999, shaped it into a skull with a decorative headdress, and shared the strange sound on the Action Lab YouTube channel dedicated to scientific experiments.

“This was considered the scariest sound in the world,” he said in the video.

“Believe it or not, this is not a human cry.

“The sound that the death whistle makes strikes fear into your heart.”

The shape of the whistle mimics the shape of the human larynx, according to Orgel.

Once the user blows into it, the air splits into two, creating oscillating sound waves that circulate in a large chamber before escaping through the second opening.

“At first the archaeologists thought this had to be some kind of game, and they didn't think much about it,” Orgel said in the new video.

“It wasn't until 15 years later that for some reason, a scientist blew out the hole at the top of it and this is the sound that came out.

“It was an amazing discovery because it sounded like a human being screaming.”