MEXICO CITY, Mexico (AP) — Scientists were fascinated by the ghostly find: a human skeleton buried in an Aztec temple with a clay, skull-shaped whistle in each bony hand.

Roberto Velazquez has devoted his career to recreating the forgotten sounds of his distant ancestors.

But no one blew into the noisemakers for nearly 15 years. When someone finally did, the shrill, windy screech made the spine tingle.

If death had a sound, this was it.

Roberto Velazquez believes the Aztecs played this mournful wail from the so-called Whistles of Death before they were sacrificed to the gods.

The 66-year-old mechanical engineer has devoted his career to recreating the sounds of his pre-Columbian ancestors, producing hundreds of replicas of whistles, flutes and wind instruments unearthed in Mexico’s ruins.

For years, many archaeologists who uncovered ancient noisemakers dismissed them as toys. Museums relegated them to warehouses. But while most studies and exhibits of ancient cultures focus on how they looked, Velazquez said the noisemakers provide a rare glimpse into how they sounded.

Hear some of the spine-tingling sounds of the ancient Aztecs:
VIDEO AND SOUND

“We’ve been looking at our ancient culture as if they were deaf and mute,” he said. “But I think all of this is tied closely to what they did, how they thought.”

Velazquez is part of a growing field of study that includes archaeologists, musicians and historians. Medical doctors are interested too, believing the Aztecs may have used sound to treat illnesses.

Noisemakers made of clay, turkey feathers, sugar cane, frog skins and other natural materials were an integral part of pre-Columbian life, found at nearly every Mayan site.

The Aztecs sounded the low, foghorn hum of conch shells at the start of ceremonies and possibly during wars to communicate strategies. Hunters likely used animal-shaped ocarinas to produce throaty grunts that lured deer.

The modern-day archaeologists who came up with the term Whistles of Death believe they were meant to help the deceased journey into the underworld, while tribes are said to have emitted terrifying sounds to fend off enemies, much like high-tech crowd-control devices available today.

Experts also believe pre-Columbian tribes used some of the instruments to send the human brain into a dream state and treat certain illnesses. The ancient whistles could guide research into how rhythmic sounds alter heart rates and states of consciousness.

Among Velazquez’s replicas are those that emit a strange cacophony so strong that their frequency nears the maximum range of human hearing.

Chronicles by Spanish priests from the 1500s described the Aztec and Mayan sounds as sad and doleful, although these may have been only what was played in their presence.

“My experience is that at least some pre-Hispanic sounds are more destructive than positive, others are highly trance-evocative,” said Arnd Adje Both, an expert in pre-Hispanic music archaeology who was the first to blow the Whistles of Death found in the Aztec skeleton’s hands. “Surely, sounds were used in all kind of cults, such as sacrificial ones, but also in healing ceremonies.”

Sounds still play an important role in Mexican society. A cow bell announces the arrival of the garbage truck outside Mexico City homes. A trilling, tuneless flute heralds the knife sharpener’s arrival. A whistle emitting cat meows says the lottery ticket seller is here.

But pre-Columbian instruments often end up in a warehouse, Velazquez said, “and I’m talking about museums around the world doing this, not just here.”

That’s changing, said Tomas Barrientos, director of the archeology department at Del Valle University of Guatemala.

“Ten years ago, nothing was known about this,” he said. “But with the opening up of museum collections and people’s private collections, it’s an area of research that is growing in importance.”

Velazquez meticulously researches each noisemaker before replicating it. He travels across Mexico to examine newly unearthed wind instruments, some dating back to 400 B.C. and shaped like animals or deities. He studies reliefs and scans 500-year-old Spanish chronicles.

But making replicas is only part of the work. Then he has to figure out how to play them. He’ll blow into some holes and plug others, or press the instrument to his lips and flutter his tongue. Sometimes he puts the noisemaker inside his mouth and blows, fluctuating the air from his lungs.

He experimented with one frog-shaped whistle for a year before discovering its inner croak.

Renowned archaeologist Paul Healy, who made an important discovery of Mayan instruments in Belize in the 1980s, said many of the originals still work.

“A couple of these instruments we found were broken, which was great because we could actually see the construction of them, the actual technology of building a sound chamber out of paper-thin clay,” he said.

Still, their exact sounds will likely remain a mystery.

“When you blow into them, you still can get notes from them, so you could figure out what the range was,” Healy said. “But what we don’t have is sheet music to give us a more accurate picture of what it sounded like.”

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la Reina de la Tercera Edad

To promote the improvement of the quality of life of the population aged 60 and over, with activities recreational, occupational therapy and paid, with the aim of offering real alternatives that will enable them to raise their self-esteem and encourage self-sufficiency, thereby facilitating their development, the Cultural Department of Puerto Vallarta is staging a contest for the Queen of the Third Age on April 10 at 6pm in the Los Arcos Amphitheater. Free.