Freddy Silva is considered one of the world’s leading authorities on crop circles research. He is the best-selling author of Secrets in the Fields: The Science And Mysticism of Crop Circles, the most comprehensive book on this subject today, now published in four languages. Freddy is also an international keynote speaker and documentary filmmaker. Author website:

Books by Freddy Silva

The Lost Art of Resurrection Initiation, secret chambers and the quest for the Otherworld

The Missing Lands Uncovering Earth's Pre-flood Civilization

First Templar Nation How the Knights Templar Created Europe's First Nation-state

The Divine Blueprint Temples, power places, and the global plan to shape the human soul

Chartres Cathedral The Missing or Heretic Guide

Secrets In The Fields The Science And Mysticism Of Crop Circles

During the twilight days of 1998, small articles tucked away in the nether regions of the British press quietly announced ‘Unknown Force Was Behind Corn Circles, Claims Hoaxer’. This dramatic U-turn by the surviving member of the infamous Doug & Dave duo— who since 1991 have misled the world with tales of their crop flattening prowess with planks of wood— illustrates that the hand of man materialized in crop circle lore long after the real phenomenon manifested.

Latter-day hoaxers claim to have begun the phenomenon in 1978, yet unpublished evidence proved that crop circles had appeared around the world throughout the 1900s, with dozens of eyewitnesses reporting crop circles forming in a matter of seconds as far back as 1890; several descriptive accounts were even documented in 1678 by Robert Plot, then curator of the Ashmolean Library, Oxford. If hoaxers are responsible, then they appear to have mastered the art of time travel, in which case it is they who should be under scientific scrutiny.

To date some 10,000 crop circles have been catalogued worldwide, and their anomalous features continue to defy human replication: plants bent an inch above soil, their cellular structure altered and stems lightly burned around the base; alteration of the soil and changes to its crystalline structure; depletion of the local watershed, alteration of the local electro-magnetic field, and dowsable, long-lasting energy patterns, not to mention hundreds of measured effects on the human biological field. So much, then, for two guys and a piece of wood. But thanks to a virtual embargo on research coverage throughout the media, a popular myth has developed that all crop circles have been nothing more than a prank with a plank.

By definition, a hoax is a forgery, and a forger requires an original from which to copy. So what is this ‘unknown force’ that creates genuine crop circles? One answer may lie with sound.

Traditionally, sound is considered a prime Universal force in the creation of matter. This is echoed in the world’s cosmologies and religions, most of which declare that ‘In the beginning was the Word, and the Word was with God’. Hopi and Navajo traditions assert that in ancient times shamans could utter words onto sand and create geometric patterns, a concept not dissimilar to the Hindu mandalas which are said to be expressions of vibrations from the unseen Universe; eastern faiths such as Islam use sacred geometry to express the image of God. Today we know that sound filmed in liquid creates harmonic geometric patterns, a technique already known to 12th century architects when they designed of Gothic cathedrals using sacred geometry to enhance the buildings’ sonic effects, and thus, alter the state of consciousness in those who used them for prayer.

Sound, resonance and vibration are fundamental to our supposedly physical world. Under the microscope, atoms are seen as harmonic resonators, and their structures are composed of geometric rhythms sharing similar harmonics to those found in the pure music scale. Physical reality, it seems, is governed by geometric arrays related to sound frequencies.

Even that primeval Hindu sound, the OM (from which is derived our modern term ‘hum’) when sung into a tonoscope produces geometric shapes attributed with ‘sacredness’.

As the expression of number in space, geometry is inextricably linked to sound, since the laws of the former govern the mathematical intervals that make up the notes in the western music scale­— the diatonic ratios— possibly why the ancient Egyptians referred to geometry as frozen music.

In the February 1992 edition of Science News, Prof. Gerald Hawkins used the principles of Euclidean geometry to prove that four theorems can be derived from the relationships of elements in crop circles. More significantly, he discovered a previously unknown fifth theorem from which he could derive the other four. Despite an open challenge to over half a million subscribers none have been able to create such a theorem, which Euclid himself only hinted at twenty-three centuries earlier in his thirteen treatises on mathematics. So it came as a slight shock when its equilateral version materialized as a 160,000 sq. ft. crop circle at Litchfield, Hampshire, in 1995.

Since the crop circle theorems also produce diatonic ratios, a link exists between crop circles and musical notes, which are the by-product of the harmonic laws of sound frequency. Soon after, crop circles bearing unmistakable associations with sound began to appear. One contained a curious ratchet feature from which is constructed a musical diagram also dating to the Egyptians, the Lambdoma. Also known as the Pythagorean Table, it defines the exact relationships between musical harmonics and mathematical ratios.

But it was a convincing crop circle etched in barley at Goodwood Clatford­— which had its plants bent six inches from the top— that gave the proverbial nod to sound, for here was a representation of a cymatic pattern.

Cymatics is the study of vibrational wave patterns. One of its twentieth-century pupils was Swiss scientist Hans Jenny who painstaking captured on film the transmission of sound as it interacted with powders and liquids.

He observed how sound vibration created geometric shapes: a low frequency produced a simple circle encompassed by rings, whereas a higher frequency increased the number of concentric rings around a central circle. As the frequencies rose so, too, did the complexity of shapes, to the point where tetrahedrons, mandalas and other sacred geometric forms could be discerned. Like the Egyptians, Jenny enabled humanity to observe ‘frozen music’.

Jenny also provided a physical connection to the creation of crop circles I’d been looking for, since many of the vibrational patterns captured in his photos mimic their designs. Some are blatant imitations, such as the circle surrounded by concentric rings typical of early 1980s patterns; the tetrahedron at Barbury Castle in 1991; even the highly structured star fractals of 1997. Visually there is little room to deny the connection. But what evidence links sound and crop circles at a physical level?

Many accounts exist of a trilling sound heard by people prior to witnessing crop circles forming. The reports describe a sudden stillness in the morning air followed by a trilling sound and the banging together of wheat heads, despite an absence of wind. A whole section of crop then lays down in spiral fashion, the whole episode lasting less than fifteen seconds. Interestingly, the Aborigines relate to this trilling sound: during their ceremonies to contact the sky spirits, a specially-shaped piece of wood called ‘bora’ is attached to the end of a long string and whirled, creating a noise practically identical to the crop circle hum. It was later discovered that not only have crop circles appeared in Australia but their manifestation figures in Aboriginal lore, just as crop circle geometries appear in Aboriginal rock paintings.

This crop circle sound was captured on several occasions on magnetic tape, notably by the BBC whilst recording an interview inside a crop circle, whereupon the noise rendered a £30,000 TV camera obsolete. Since this sound has the ability to transmit on radio frequencies and interfere with electronic equipment, birds and insects can be ruled out; and although skeptics are quick to accuse that the recorded sound is, in fact, the grasshopper warbler, stroboscopic analysis of both voice prints reveal vast differences between this bird and the bizarre noise. Besides, such birds frequent marshes, not vast, open fields of cereal crop. Subsequent analysis of the trilling noise at Sussex University and NASA’s Jet Propulsion Laboratory concluded the noise was mechanical in nature and vibrating at a frequency of 5.0-5.2 kHz.

This revelation took me on an extraordinary journey of connections. Back in the 1950’s agricultural researcher George Smith found that exposing corn to sound frequencies produced a higher heat content in soil, as well as a slight burnt appearance in the plants. Such effects are consistent with the slight ‘baking’ regularly observed in the soil of crop circles, where the affected area appears noticeably drier than the rest of the field despite overnight rain; the same applies to the ‘slight burning’ at the base of crop circle stalks.

Oddly enough, Smith speculated at the time that particular sound frequencies also increased molecular activity in plants, three decades before it would be discovered in samples taken from crop circles: tests performed since 1989 by American physicist Dr. W. Levengood consistently show how the energy creating crop circles affects seed embryo and plant growth, elongates the plants’ nodes, even alter the pattern of their crystalline structure.

Since sudden and abnormal growth is also known to occur in plants affected by the energy of a crop circle, it has been postulated that microwave is behind the phenomenon. However, microwave has the ability to render biological systems sterile, and an overdose will even kill organisms. And crop circles plants are certainly alive and well. Experiments using sound on wheat at the University of Ottawa, however, also generated accelerated growth in plants, and the sound frequency applied had produced a resonant effect in the plants’ cells, thereby affecting their metabolism. The frequency applied was identical to the crop circle trilling noise.

But perhaps the greatest connection linking sound to the manifestation of crop circles lies in their greatest anomaly: the permanent bending of the plants’ stems. During the 1960s, laboratory experiments at Temple Buell College, Colorado, measured the effects of music on plants by subjecting them to different tones. Exposure to heavy metal music made the plants tilt in the opposite direction or die, whereas classical music lulled the plants toward the speakers. But in the case of Hindu devotional music— and specifically the music of Ravi Shankar— the stems bent in excess of 60º to the vertical, perhaps the closest any human has ever come to recreating that right angle bend common to genuine crop circles.

Further applications of Indian devotional song to the plants at Annamalai University also showed a number of biophysical alterations in the specimens—similar biophysical changes which now occur in plants collected from crop circles.

Sound as one energy source capable of creating crop circles now becomes very feasible. But what type of sound coaxes plants to bend and lie down, applying firm and gentle pressure and, given the intricacy and complexity of latter-day patterns, with a fine degree of precision?

Interestingly, ultrasound is capable of interacting with physical elements to such an incredible degree. It can be aimed like a light beam, and specific frequencies can be focused to cause certain kinds of molecules to vibrate while others nearby are left unmoved. The higher the frequency of ultrasound, the greater its ability to be directed. This requires frequencies in the high MHz range, such as those detected inside crop circles.

Readings generally hover in the vicinity of 260-320 MHz. However, just as the geometric complexity of crop circles continues to rise over the years so too do the frequencies inside them. This coincides with Jenny’s experiments which show that a relationship exists between the rising complexity of cymatic geometries in proportion to the rise of dispensed frequency. In other words, the level of frequency correlates with the increase in design intricacy.

Such extremely high frequencies are known to affect states of awareness and consciousness in humans, and visitors in crop formations often report this. Such effects are traditionally associated with sacred spaces, stone circles in particular, and it is interesting to note that ultrasound has been detected at certain stone circles and standing stones in England.

When tuned in the MHz range, ultrasound prevents damage to sensitive tissue, so its healing properties are today used in the treatment of muscular ailments. Again, this mirrors the folklore of sacred spaces, and as far as crop circles are concerned, many hundreds of people have reported healings: one woman suffering from arthritis for 14 years was immediately cured of her condition after contac twith a crop circle, despite her being a skeptic; long-time sufferers of Parkinson’s stop shaking; one man with a retinal eye tumor, 99% malignant, saw the tumor shrivel away.

Below 20 Hz sound becomes infrasonic, and such frequencies are directly involved with biological processes, and here lies the direct connection to crop circles. When combined with high-pressure, the acoustic power of infrasound boils the water inside a cavity, in this case the water inside the plants’ stems. In laboratory conditions this action occurs in one nanosecond. As water heats it expands, and a close look at crop circle plants reveals tiny holes in their nodes where this superheated water has blown outwards. With a hollow cavity near the base, and the stems made subtle like molten glass by the heat, the now top-heavy plants collapse into their new horizontal position.

Since this action (called vapor cavitation) creates local temperature increases of hundreds of thousands of degrees for a fraction of a second it is not now difficult to see how millions of gallons of groundwater disappear within the area of a crop circle, or why the plants attain a cooked, malty fragrance. Combine this with Levengood’s discovery of microscopic blow-holes in the plants’ cell wall pits (indicating the rapid boiling of water inside the plant), and everything starts to fall into place.

Infrasound is also capable of atomizing water molecules, creating a fine mist, and several farmers have described columns of mist rising from within newly-arrived crop circles.

Finally, vapor cavitation is accompanied by a sudden spark of light called ‘sonoluminescence’ This is caused by the production of electrical discharges as the water is ionized. The lower the operating frequency, the greater the effect, and 18 Hz is the lowest safety threshold below which the pressure formed by infrasound is known to produce disruption to chromosomes. Every summer, crop circle plants of every variety are sent for blind tests by Dr. Levengood, and some inevitably show unmistakable disruption to their chromosomes. Yet give him samples deliberately produced by field forgers and he’ll find something remarkable — perfectly normal plants!

The musical scale, constructed on the harmonics of sacred geometry, and now found within the framework of crop circles, represents the mathematical structure of the soul of the world because it embodies the essence of the Universe. So it’s no coincidence that a large percentage of crop circles can be identified with, and by, ancient cultures who to this day honour their histories through song and music, their healing rituals performed with sound. This relationship is applied in Buddhist mandalas, whose elaborate geometries are used to alter states of consciousness. Perhaps it is not by coincidence that crop circle designs mirror these intricate patterns, just as they bear an uncanny familiarity to Jenny’s materializations of sound.

If sound vibrations are creating crop circles, is it not possible that they can arouse the individual at a spiritual level? After all, it’s through music that whole human experiences are celebrated and carried from generation to generation. It is very probable that it is for this reason that the very shape of the human ear— more specifically the cochlea— is a spiral constructed according to the harmonic laws of tone, just as the same spiral is the primary form from which thousands of crop circles have sprung.

Music is a carrier for social change. The effects of Handel’s music is believed to have reversed the state of morality in Victorian England, just as the anarchic overtones of Punk corralled disillusioned youth into fighting an establishment that held no tolerance for those who stepped outside its rules. The effects in peoples’ awareness after contact with crop circles is similarly documented: in 1990 a pictogram at Alton Barnes sported the shape of a trident, a symbol associated in many ancient cultures with transformation, and with creator gods such as Neptune and Shiva. Ironically, it was through exposure to this unique crop circle that millions around the world were transformed, just as images of crop circles today continue to enlighten the awareness of those who come into contact with them.
If sound is one of the formative principles behind crop circles, it is not surprising that they are leaving psychological impressions on those whose antenna is extended and receptive to their tune.

© 1997, 2010. Extracts from the best-selling book Secrets in the Fields: The Science and Mysticism of Crop Circles. For book details and further research, visit author’s site,


All references in Secrets In The Fields: The Science And Mysticism Of Crop Circles (Freddy Silva). Sources: The Secret Life Of Plants (Peter Tompkins); The Secret Power of Music (David Tame); Cymatics (Hans Jenny); Sacred Geometry (Robert Lawlor); Nada Brahma (Joachim Ernst Berendt).


For over fifteen years Freddy Silva has been an author, and independent researcher of ancient systems of knowledge, alternative history and earth mysteries. He has been a permanent feature in the international lecture circuit since 2003, with notable keynote presentations at the International Science and Consciousness Conference, the International Society For The Study Of Subtle Energies & Energy Medicine, and the Association for Research and Enlightenment. He has also appeared numerous times on national and international radio shows. His other published works include The Divine Blueprint: Temples, Places, and the Global Plan to Shape the Human Soul; and Secrets In The Fields: The Science and Mysticism of Crop Circles, a critically acclaimed international bestseller on this controversial topic. He is also a documentary film-maker, with the titles Stairways To Heaven: The Practical Magic of Sacred Space, and Templemaking. He contributes regularly to several magazines, and conducts tours in Britain, Malta and Egypt.