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        Sonics: (Prehistoric Acoustic Phenomena)

There are several descriptions and relics  that proclaim the importance of sound in both ceremony and structure.

Researchers today are demonstrating that the properties of sound were explored, appreciated and used by our Palaeolithic ancestors in combination with their cave-art (see below).

The results of modern research in the field of Sonics include 'sonic-levitation' and 'sonic crowd-control'.

The power of sound has been demonstrated by opera singers who have been known, on occasion, to shatter glass simply by producing the correct sound. This effect was presumably already understood when the story of the shattering of the 'walls of Jericho' as written in the 'Old Testament':

... 'The 'Captain of the Host of the Lord' came to Joshua before he stormed Jericho and told him to 'circle the city for six days, and seven priests shall blow seven trumpets of rams horns, and on the seventh day, when you hear the trumpets, all the people shall shout with a great shout and the city shall fall down flat'.

 
 

 

   The Ancient Use of Sonics:

Sonics are commonly associated in tradition with the moving of heavy stones.

A story was told by the local Aymara Indians to a Spanish traveller who visited Tiahuanaco shortly after the conquest spoke of the city's original foundation in the age of Chamac Pacha, or First Creation,  long before the coming of the Incas. Its earliest inhabitants, they said,  possessed supernatural powers, for which they were able miraculously to lift stones of off the ground, which "...were carried [from the mountain quarries] through the air to the sound of a trumpet". (1)

Mayan legends says that the temple of Uxmal (right), in Mexico was built by a race of dwarves, which apparently only had to whistle and 'heavy rocks would move into place'. It is said that if a person stands at the base of the pyramid-like Temple of the magician and claps their hands the stone structure at the top produces a 'chirping sound' (1)

According to classical Greek writers, Thebes, the capital of Boeotia was founded by Cadmus, a celebrated Phoenician. It was finished off, the story goes, by a son of Jupiter named Amphion, who was able to move large stones to the sound of a lyre of harp, by which manner, he was able to construct the walls of Thebes. Appollonius Rhodius, who lived in the third century BC, poetically recalled in Argonautica how Amphion would sing loud and clear  on his golden lyre' as 'rock twice as large followed his footsteps'. Tradition surrounding Cadmus clearly indicate that Thebes was founded by Phoenician migrants who must have settled there in the third or second millennium BC.

 

Phoenicia's oldest known historian, Sanchaniatho, spoke of the god Ouranus or Coelus founding the first city at a place called Byblos. He also said that one of the gods 'Taautus' (the Egyptian Thoth), founded the Egyptian civilisation. He also states that Ouranus 'devised Baetulia, contriving stones that moved as having life'

In the early 20th century, a Swedish doctor is reputed to have witnessed stone blocks 1.5 metres in length and a metre in height and width, being levitated through the air through the process of sound. (1)

 

Examples of sympathetic vibrations in Prehistoric structures.

Chitzen Itza

At least two structures at the Mayan ruins of Chichen Itza in Mexico display unusual and unexplained acoustical properties:

The Great Ball-court: The Great Ball-court is 545 feet long and 225 feet wide overall. It has no vault, no continuity between the walls and is totally open to the sky.

Each end has a raised "temple" area. A whisper from end can be heard clearly at the other end 500 feet away and through the length and breath of the court. The sound waves are unaffected by wind direction or time of day/night. Archaeologists engaged in the reconstruction noted that the sound transmission became stronger and clearer as they proceeded. In 1931 Leopold Stokowski spent 4 days at the site to determine the acoustic principals that could be applied to an open-air concert theatre he was designing.

The Castillo: This structure is a temple that looks like a pyramid and is the one most commonly pictured on travel brochures for the Mexican Yucatan. Apparently if you stand facing the foot of the temple and shout the echo comes back as a piercing shriek. Also, a person standing on the top step can speak in a normal voice and be heard by those at ground level for some distance. This quality is also shared by another Mayan pyramid at Tikal.

If a person stands at the bottom of the Castillo and shouts, the sound will echo as a shriek that comes from the top of the structure. If someone stands on top and speaks in a normal voice, they can be heard on the ground at a distance of 150 metres away. (1)

At Palenque, also in Mexico, it is apparently the case that if three people stand on top of the three pyramids, a three-way conversation can easily be held.

It is said that if a person stands at the base of the pyramid-like Temple of the Magician and claps their hands the stone structure at the top produces a 'chirping sound' (1)

 

'Huygens serenade':

A curious principle, discovered by Christiaan Hüygens in the 1650s.

Huygens found that if you leave two clocks with pendulums ticking in close proximity for long enough, then they fall into perfect time, resulting in one hearing one bigger clock ticking.

This is related to the low frequency of 1 cycle per second ( 1Hz ) frequency being experienced by both timepieces, and therefore being emitted, or radiated. The noise made by a clock is essentially a form of simple loudspeaker. The mass of it moves the air in such a way that you can hear a click. Because you can hear a click, then the same sound pressure is being applied to the case of the other clock just the same.  

 

BBC NEWS Article: April 1998.

New research suggests that the ancient stone circles and burial mounds of north west Europe may have been designed to act as giant loudspeakers to amplify drums being played during rituals. Science correspondent David Whitehouse reports:

Scattered across the landscape of north west Europe are prehistoric monuments from the Neolithic era. Stone circles like Stonehenge as well as covered burial chambers can be over 5,000 years old.

The stones stand silent in the landscape but a new study of these ancient structures has found that they possess some remarkable acoustical properties.

When Aaron Watson of Reading University visited a Neolithic stone circle in Scotland he noticed a curious echo which changed as he moved around inside the circle.

Tests with audio recording equipment showed that the large, flat-sided stones were positioned in such a way to reflect sound towards the centre of the stone circle.

But it is the Neolithic burial mounds that have the strangest properties. They usually consist of a long chamber which is reached by crawling through a small tunnel.

'I was amazed by these caverns,' said University of Reading physicist Dr David Keating.

'The caverns vary in size but their resonant frequencies are very similar. They would amplify a fast drumbeat producing enhanced sounds and echoes during rituals, he added.

Dr Keating suggests that the caverns are designed to generate an acoustic phenomenon called Helmholtz resonance - the hollow type of sound created by blowing a stream of air across the top of an empty bottle.

Calculations suggest that drumming at two beats a second would have caused resonance. Inside the dark chamber with its stale air and presence of the dead, the enhanced sound would have produced an unforgettable experience for Neolithic man.

Ref: http://news.bbc.co.uk/2/hi/science/nature/72494.stm

 

Modern day experiments with acoustic vibrations:

A glass has a natural resonance, a frequency at which it will vibrate easily, and the body of the glass vibrates under resonance. If the force making the glass vibrate is big enough, the size of the vibration will become so large that the glass breaks.

(Click here for more about breaking glass: http://www.acoustics.salford.ac.uk/acoustics_info/glass/

 

The Physics of Sound Levitation: A basic acoustic levitator has two main parts: A transducer, which is a vibrating surface that makes sound, and a reflector. Often, the transducer and reflector have concave surfaces to help focus the sound. A sound wave travels away from the transducer and bounces off the reflector. Three basic properties of this travelling, reflecting wave help it to suspend objects in midair.

Acoustic Levitation; A Summary http://science.howstuffworks.com/acoustic-levitation.htm 

 

This is an acoustic levitation chamber, designed and built in 1987 as a micro-gravity experiment for NASA related subject matter.

 

Article: Scientists levitate small live animals using sounds...

In the past, researchers at Northwestern Polytechnical University in Xi'an, China, used ultrasound fields to successfully levitate globs of the heaviest solid and liquid—iridium and mercury, respectively. The aim of their work is to learn how to manufacture everything from pharmaceuticals to alloys without the aid of containers. At times compounds are too corrosive for containers to hold, or they react with containers in other undesirable ways.

"An interesting question is, 'What will happen if a living animal is put into the acoustic field?' Will it also be stably levitated?" researcher Wenjun Xie, a materials physicist at Northwestern Polytechnical University, told LiveScience.

Xie and his colleagues employed an ultrasound emitter and reflector that generated a sound pressure field between them. The emitter produced roughly 20-millimeter-wavelength sounds, meaning it could in theory levitate objects half that wavelength or less.

After the investigators got the ultrasound field going, they used tweezers to carefully place animals between the emitter and reflector. The scientists found they could float ants, beetles, spiders, ladybirds, bees, tadpoles and fish up to a little more than a third of an inch long in midair. When they levitated a fish and tadpole, the researchers added water to the ultrasound field every minute via syringe.

The levitated ant tried crawling in the air and struggled to escape by rapidly flexing its legs, although it generally failed because its feet find little purchase in the air. The ladybug tried flying away but also failed when the field was too strong to break away from.

The research team reported their findings online Nov. 20 in the journal Applied Physics Letters.

Link to full article: http://www.livescience.com/technology/061129_acoustic_levitation.html

 

Crowd Control: How the 'Sonic Cannon' Works: http://www.livescience.com/technology/090925-sonic-cannon-crowd-control.html

 

 

Hypogeum cavities.The Hypogeum, Malta:

The Hypogeum on Malta contains a 'speaking chamber' which is a hole in the wall carved with a rounded interior surface. The result is that anything spoken into it produces an echo which reverberates throughout the hypogeum. It is speculated that this hole was part of a ceremonial process. Several small chambers (right) in the Hypogeum are also suspected of being used for ritual purposes as from within these cubicles, echoes from the 'speaking' chamber reverberate into a rhythm that is similar to the human heartbeat.

(More about the Hypogeum)

 

 

Modern Myths of Acoustic Levitation:

Tibetan Monks levitating stones: (Excerpt from 'Anti-gravity and the World Grid' edited by D.H. Childress):

A Swedish doctor, Dr. Jarl, a friend of Kjelsons, studied at Oxford. During those times he became friends with a young Tibetan student. A couple of years later, it was 1939, Dr. Jarl made a journey to Egypt for the English Scientific Society. There he was seen by a messenger of his Tibetan friend, and urgently requested to come to Tibet to treat a high Lama.

After Dr. Jarl got the leave he followed the messenger and arrived after a long journey by plane and Yak caravans, at the monastery, where the old Lama and his friend who was now holding a high position were now living.

Dr. Jarl stayed there for some time, and because of his friendship with the Tibetans he learned a lot of things that other foreigners had no chance to hear about or observe.

One day his friend took him to a place in the neighbourhood of the monastery and showed him a sloping meadow which was surrounded in the north west by high cliffs. In one of the rock walls, at a height of about 250 metres was a big hole which looked like the entrance to a cave.

In front of this hole there was a platform on which the monks were building a rock wall. The only access to this platform was from the top of the cliff and the monks lowered themselves down with the help of ropes.

In the middle of the meadow, about 250 metres from the cliff, was a polished slab of rock with a bowl like cavity in the centre. The bowl had a diameter of one metre and a depth of 15 centimetres. A block of stone was manoeuvred into this cavity by Yak oxen. The block was one metre wide and one and one half metres long. Then 19 musical instruments were set in an arc of 90 degrees at a distance of 63 metres from the stone slab.

The radius of 63 metres was measured out accurately. The musical instruments consisted of 13 drums and 6 trumpets (Ragdons) Eight drums had a cross-section of one metre, and a length of one and one half metres. Four drums were medium size with a cross-section of 0.7 metre and a length of one metre. The only small drum had a cross-section of 0.2 metres and a length of 0.3 metres. All the trumpets were the same size.

They had a length of 3.12 metres and an opening of 0.3 metres. The big drums and all the trumpets were fixed on mounts which could be adjusted with staffs in the direction of the slab of stone. The big drums were made of 1mm thick sheet iron, and had a weight of 150kg. They were built in five sections. All the drums were open at one end, while the other end had a bottom of metal, on which the monks beat with big leather clubs. Behind each instrument was a row of monks.

When the stone was in position the monk behind the small drum gave a signal to start the concert. The small drum had a very sharp sound, and could be heard even with the other instruments making a terrible din. All the monks were singing and chanting a prayer, slowly increasing the tempo of this unbelievable noise. During the first four minutes nothing happened, then as the speed of the drumming, and the noise, increased, the big stone block started to rock and sway, and suddenly it took off into the air with an increasing speed in the direction of the platform in front of the cave hole 250 metres high. After three minutes of ascent it landed on the platform.

Continuously they brought new blocks to the meadow, and the monks using this method, transported 5 to 6 blocks per hour on a parabolic flight track approximately 500 metres long and 250 metres high. From time to time a stone split, and the monks moved the split stones away.

Dr. Jarl knew about the hurling of the stones. Tibetan experts like Linaver, Spalding and Huc had spoken about it, but they had never seen it. So Dr. Jarl was the first foreigner who had the opportunity to see this remarkable spectacle. Because he had the opinion in the beginning that he was the victim of mass-psychosis he made two films of the incident. The films showed exactly the same things that he had witnessed.

 

Archaeo-acoustics:

The term “archaeoacoustics” simply means the study of sound in archaeological contexts.

We now know that sound was important to, and probably considered magical and mysterious by, people at least as far back as the Palaeolithic (Old Stone Age) painted caves of France and Spain, dating to tens of thousands of years ago. It has been found that some of the stalactites and stalagmites in them are musical, in that they will issue pure bell-, drum- or gong-like notes when struck. Some archaeologists refer to these musical calcite formations as “lithophones”.

Most if not all of these relatively rare features had been painted with geometric signs and animal figures in Stone Age times, and they also display ancient percussion marks – so ancient, in fact, that they are visible only through a covering of calcite deposits.

Currently, Russian and Finnish researchers are studying “palaeoacoustic” ringing rock sites on the shores of Lake Onega in Russia. They have found that the sound these natural stone “drums” make when struck is amplified by the surface of the lake, causing it to carry for kilometres around. The features are surrounded by concentrations of rock art. Similarly, archaeologists in the United States have identified “ringing rocks” – boulders that emit bell- or gong-like sounds when struck. Many of these, too, are marked with rock carvings. (2)

 

Article: (New Scientist, p. 14, November 28, 1992) - 'The Acoustics Of Rock Art'

S. Waller has visited rock art sites in Europe, North America, and Australia. Standing well back from the painted walls, he claps or creates percussion sounds, and records the echo's bouncing back. It turns out, that rock art seems to be placed intentionally where echo's are not only unusually loud but are also related to the pictured subject matter. Where hoofed animals are depicted, one easily evokes echo's of a running herd. If a person is drawn, the echo's of voices seem to emanate from the picture itself!

"At open air sites with paintings, Waller found that echo's reverberate on average at a level 8 decibels above the level of the background. At sites without art the average was 3 decibels. In deep caves such as Lascaux and Font-de-Gaume in France, echo's in painted chambers produce sound levels of between 23 and 31 decibels. Deep cave walls painted with cats produce sounds from about 1 to 7 decibels. In contrast, surfaces without paint are 'totally flat'."

(Dayton, Leigh; "Rock Art Evokes Beastly Echos of the Past," New Scientist, p. 14, November 28, 1992.)

 

The Acoustic Qualities of the Stonehenge Bluestones:

'There is an intriguing aspect to the Preseli bluestones – a relatively high proportion of them (perhaps as much as ten percent) have the usually rare property of being “musical”. That is, they can ring like a bell or gong, or resound like a drum, when struck with a small hammer-stone, instead of the dull clunking sound rock-on-rock usually makes. That this property has been noted locally down the generations is shown by the “Maenclochog” (“Ringing stones”) village place-name in the Preseli area'. (2)

(More about Stonehenge)

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References:

1). A. Collins. Gods of Eden. 1998. Headline book publ.
2). http://www.landscape-perception.com/archaeoacoustics/

 

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