Taller Aire, Sonido y Poder. Festival Audiovisual ZEMOS98 10a

The Sonic Weapon of Vladimir Gavreau

By • Mar 9th, 2008 • Category: TEXTO


“Deadly Sounds” — Dr. Vladimir Gavreau

“Lost Science” by Gerry Vassilatos
Limited permission granted to use this material in other presentations.
ISBN 0-932813-75-5 © 1999


He listened and closed his eyes as the rolling waves of sound poured over and through his being. Thrilling, intoxicating, the hysteria of heaven, the enthralled and frightening flight of angels. Electrifying. Messaien’s organ music signaled messages of meaning, titanic foghorns ululating among dimly perceived near-worlds. Olivier Messaien, master composer of musical expressionism, used the ground thrumming tones of great Parisian cathedral organs to evoke sensations, which may only be called otherworldly. Masterfully macabre. Black foundations, blue pillars, and rainbow ceilings.

Sound, rhythm, and space. Ultra-chromatic chord frames, rising like rock walls from the black depths. And immense stellar crystallizations, radiating tonal perfumes through deep and black radiant space. Lovely and lyrically swooping melodies, the flight of birds through delicate limbs. And melodic lines, reaching up toward unknown depths of space, each had their foundation in ultra bass tones of rooted depth. The basso profunda of Messaien are the critical foundations, the strong vertical pillars of an immense architecture, which extends beyond performance walls. He scoured the deep and unreachable roots of worlds to hold his musical cathedrals together. Such majesty and grandeur of sound! Rich in the intelligence, which flooded and made the world, the musical currents and the atmosphere of tones. Fluidic music and meaning.

The most fundamental signals, which permeate this world, are inaudible. They not only surpass our hearing, but they undergird our being. Natural infrasounds rumble through experience daily. There manifestations are fortunately infrequent and incoherent. Infrasound is inaudible to human hearing, being of pitch below 15 cycles per second. The bottom human limit. The plynth. The foundation. Infrasound is not heard, it is felt. Infrasound holds a terrible secret in its silent roar.

Infrasound produces varied physiological sensations, which begin as vague “irritations”. At certain pitch, infrasound produces physical pressure. At specific low intensity, fear and disorientation. Nazi propaganda engineers methodically used infrasound to stir up the hostilities of crowds who were gathered to hear their madman. The results are historical nightmares.

At a very specific pitch, infrasound explodes matter. At others, infrasound incapacitates and kills. Organisms rupture in its blast. Sea creatures use this power to stun and kill prey.

The swelling bass tones of the cathedral seem as though they can burst the very pillars, which uphold the ancient vaults. Stained glass windows have been known to erupt in a shower of colored fragments from the organ’s basso profunda. Impulsed ultrabass tones … thunder. Somewhere in the almost inaudible roll of these basement sounds there was a devastating and fearful power.


As thunderous tones deepen, their power seemingly intensifies over frail barriers such as glass windows. Certain abrupt thunder peals often shatter windows into tiny fragments. In the apparent absence of thunderous tones we may observe the strong and continuous vibration of glass windowpanes during storms. A sudden eerie silence, and the window is shattered before our eyes. Natural phenomena are prodigious generators of infrasound. The potent distal effects produced when natural explosions occur produce legendary effects. When Krakatoa exploded, windows were shattered hundreds of miles away by the infrasonic wave. Wind was not the causative agent of these occurrences, as no wind was felt or detected. Seismographic stations registered the blast, and barometers measured the shockwaves. The “ringing” of both earth and atmosphere continued for hours. It is believed that infrasound actually formed the upper pitch of this natural volcanic explosion, tones unmeasurably deep forming the actual “central harmonic” of the event. The island of Krakatoa was literally lifted into orbit in the fatal blast. Brilliant sunsets followed for many years thereafter, the sad memorial of all the souls who perished.

The power of explosives, in shattering and devastating property, lies in two zones. The first zone is that with which we are principally familiar; the actual blast site, where chemically released gases and metal fragments push back everything in their perimeter. The second less familiar zone extends very much further from the blast site than can be imagined. It is in the powerful sonic wave, which expands outward that an equally destructive danger lies. Thick pressure walls of incredible momentum, inters paced with equally thick walls of reduced air pressure, travel far away from the blast site. The blast site is the small destructive zone by comparison. Few objects can survive this destructive tide.

Analysts contend that infrasound is composed of a very broad band of pitches. These tones of immense pressure and duration “accommodate” themselves when encountering resonant cavities. All such resonant cavities are “found and destroyed” when the proper pressure waves flow into their resonances. Rooms, halls, alleys, spaces among buildings, courtyard areas, cellars, subways, sewer chambers; all these burst open into flying fragments when infrasonic waves flood them. Infrasound is the cruel tonal giant, tearing open whatever it finds in its path.

Study reveals that the sudden shock wave of an explosion propels a complex infrasonic signal far beyond the shattered perimeter. Incoherent though such shockwaves may be, their destructive influence dissolves distant walls and windows seconds after the shrapnel has done its deadly work. Objects of all shapes, sizes, and compositions explode when the infrasonic impulse passes through their space. No shield can block infrasound. Physicists have studied the refuse, which remains after an explosive charge has been detonated. Few materials can maintain their integrity. Those objects, which manage to survive explosions, are noteworthy as infrasonic “resistors”. Screen reinforced concrete does not easily succumb to the infrasonic blasts of explosive charges.


The sound of Krakatoa exploding up into space, a vertical excess of one hundred miles, succeeded in blasting out windows at a thousand mile radius from the epicenter. Certain earthquake activities produce large and virtually insensate vertical displacements of the ground surface, in extreme instances amounting to a few feet per pulse. In this case, the ground becomes the surface of a drum, ringing out its deadly cadence at infrasonic pitch hours before the event. The ground undulates with infrasonic tones, an elasticity that eventually cracks under the heaving stress.

Ultra low pitch earthquake sounds are keenly felt by animals and sensitive humans. Quakes occur in distinct stages. Long before the final breaking release of built up earth tensions, there are numerous and succinct precursory shocks. Deep shocks produce strong infrasonic impulses up to the surface, the result of massive heaving ground strata. Certain animals (fish) actually can hear infrasonic precursors. Precursory shocks are silent, being inaudible in humans. Animals, however, react strongly to the sudden surface assault of infrasonic shocks by attempting escape from the area. Animals cannot locate the source and center of these infrasonic impulses, behaving in a pitiful display of circular frenzies. The careening motion of wild horses and other domestic animals indicates their fear and anxiety. Poor creatures, neither they nor we can escape the infrasonic source. Encounters with natural infrasound reveal their vast extent, covering hundreds of square miles of surface area.

Certain animals employ infrasound as weaponry. It has been known that certain whales are able to stun their prey with powerful blasts of inaudible sounds. Called “gunshots”, whales focus these powerful blasts at large squid and other fish to paralyze and catch them. In some instances, they have been known to burst their prey apart by tonal projection alone. Human experience with these inaudible blasts have been reported. The distress calls emitted by little beached whales was sufficient to push a veterinarian back several feet in the water. Others have experienced these pressure waves, reporting that their hands could not be brought close to the sinal area of small whales because of their inaudible acoustic projections.

Infrasonic shocks produce characteristic pressure effects on structures and organisms alike. The sensation flattens the body. It is as if one were struck with a solid invisible wall from which there is no escape. There are physiological effects as well. Anxiety, fear, extreme emotional distress, and mental incapacitation are all part of the unpleasant phenomenon. Notable among human exposures to quake-correlated infrasound is the precursory nausea, which many report. This strong sensation leaves its more sensitive victims helpless. Feeling the momentary deep motion of the ground strata beneath them, numerous individuals have been used to report these sensations in a bizarre earthquake “alarm system”. Unfortunately, physiological reaction to infrasound remains continuous, long after their irritating presence has ceased. The harmfully stimulating influence of infrasound renders physiology permeable and ultrasensitive to every available environmental sensation. The extreme irritability of infrasound victims has been noted.

Earthquake infrasound manifests only at intermittent intervals, producing drastic and sustained negative modifications of consciousness. The human organism continues to reel under intermittent infrasonic assault for numerous reasons. After less than a five-minute exposure to low intensity infrasound of 10 cycles per second, dizziness will last for hours. Infrasound of 12 cycles per second produces severe and long lasting nausea after a brief low intensity exposure.


Surf pounds the shore, producing shocks of 16 cycles per second, just short of the true infrasound range. Ocean waves, which pound the atmosphere across huge ocean areas, produce an acoustic energy with a mean pitch of 16 cycles per second. The phenomenon of the “barisal guns, fog guns, lake guns” form a well documented bibliography of anomalous acoustic phenomena. These “booming” anomalous tonal phenomena are not isolated to one area or nation. Every nation has accounts of these sea-related mystery sounds. Some regions call them “bay detonations”, since they come as abruptly explosive intonations from certain bay areas.

Some of these tones manifest their shocking tones at haphazard intervals. But there are those water-related booms, which are periodic, residents near these sites being accustomed to their mysterious occurrence. The strange “explosive” sounds come at certain times of the day, at certain times of the month, and at certain times of the year. There are certain other related anomalous natural tones, which ring, hoot, and buzz. Some have been likened to organ tones, tuba blasts, and the deep intonings of very large bells. Bay sizes, wave sizes, and geologic compositions of bays and shores have been woven into complex mechanistic attempts at explaining how these mystery sounds are being generated in certain environments.

The detonation may be caused by a sudden “slapping” of bay water by a singular wave having the “right” breadth and momentum, matching the natural resonant pitch of a bay. The underlying bay rock matrix may resound in the manner of a bell, gong, or cymbal. The geological composition of the bay plays the greater part of the effect, sudden winds or water surges knocking the natural “sounding board”. These natural bay tones have great infrasonic content.

The infrasonic outputs of the mystery tones are significant. Each of these phenomena produces a range of very low pitch tones. These booming sounds have rattled windows and rocked some small towns. Animals are startled by their inaudible precursors, and humans are often dizzied after their manifestation for hours. In several areas, people are hospitalized by the “boom” related illnesses.

Waterfalls are notorious generators of infrasound. Numerous susceptible visitors at Niagara experience a peculiar nausea, which is not associated with the normal fear of heights. Thundering cataracts produce strong infrasonic shocks to which mile exposure stimulates the common malady. Lake ice and glacial ice produce deep booming sounds which ring for hours, behaving as large tympanic surfaces. The thunderous sounds associated with these occurrences produces infrasound of pitch related to ice surface mass, breadth, and length alone. Antarctic research experienced nausea in relation to ice related sounds.

Tidal waves and other sudden variations of water surfaces produce large magnitude “seiche” waves. These have been sighted by ocean going ships, where oceanic surfaces have drastically changed elevation in an incredibly short time. Ships “drop” into such huge ocean troughs and rise again after the wave passes. In dropping, some have crashed to the very rock bottom of their bays, only to be lifted in pieces when the wave resurged. Film footage of the great and horrid Alaskan Earthquake (1964) reveals this devastating sea “drop-out”.

Upon such lethal seiche tides, even in the fortunate absence of earthquakes, comes nausea and other coastal related illnesses. Large intensity infrasonic sea shocks have their powerful effect on the overlying atmosphere of their regions. These infrasonic shock waves travel for long distances. Certain bays are known for the high incidence of such illnesses, the result of resonant bay water “heavings” which occur daily. Their sickening effects are seemingly “stored up” in physiology, lasting for hours. While these phenomena proceed from deep in the heart of earth, and on its surface, there are phenomena, which generate infrasonic sources … from space.


Aerial earthquake sounds have been reported by observers. Such rushing, thrumming sounds seem to come from “everywhere” above the affected locale. Typical of infrasound, the sources cannot be accurately located. When Krakatoa exploded, barometers fluctuated rapidly in short time intervals. It was recognized that a new means for detecting earthquakes and other earth movements had been found. The horrifying destruction of Krakatoa prompted the emergence of a new science. The rapid development of sensitive barometric instruments provoked the discovery of a whole new “infrasonic world”. The opposing nations of the Cold War years used barometers and seismographs in determining the relative explosive yield of periodic underground atomic blasts. Sensitive barometric detection gradually began searching the atmosphere and earth for infrasonic “events”. Mysterious and sudden barometric variations indicates that natural infrasonic generation has a much wider source than the subterranean earth. Infrasounds associated with the Aurora Borealis are too numerous to mention, a well-chronicled occurrence.

The aurora borealis is heard to “swish, crackle, sizzle, and … thunder”. Quantitative analysts “cannot understand” how these sounds can be “heard” but not recorded. It is obvious that certain auroral sounds stimulate physiological responses, which will never register in biologically unmodified electronic systems (Lawrence). Though debates continue when referring to higher auroral tones, the “thunder” of the aurora stimulates aerial infrasounds, which can be measured.

Low level auroras have been actually seen and felt. The sounds and odors associated with this rare phenomenon are unmistakable. In one instance a chemist was fortunate enough to have lived, after witnessing the effect of auroral grounding throughout his laboratory. The incredible luminescence produced in several platino-cyanides, electro-phosphorescent chemicals, were duly noted and reported. Another such incident involved the grounding of the aurora into an elevated radio tower. The radio engineer suddenly heard a crackling sound “from everywhere”, was unable to transmit any signal power, felt completely electrified, smelled ozone everywhere, and heard the “crackling” sound. Numerous witnesses who saw the event, describing the colored column of light, which suffused the tower, feared he might have been killed by its power.

The auroral high-pitched sizzling sounds are augmented by deep and ominous thrumming. These deep tones sweep through the bodies of listeners who are fortunate enough to survive the dangerous encounter. These permeations produce an irritability and a dizzying nausea. These sounds were always equated with evil by the Eskimo. Their legends of the aurora are always fear-filled. The trademark of anxiety and dread highly characteristic of infrasonic influence, their tales also recount the “taking” of souls by the “ground walking” aurora. English observers reported that the aurora actually “swept along the ground” like a column descending from the sky. It took a multicolored appearance all along its meandering path.

Blasting through interplanetary space, solar flares assault the earth with a barrage of stupendous proportion. Their disturbing effect on electrical systems is historically noted. The appearance of electrical power surges during solar flare events has amounted to many hundreds or even thousands of amperes line-induced current. Northern lands design their power systems to accommodate these periodic manifestations of great power. Oil lines in northern lands must be carefully grounded and insulated to prevent the continuous induction of such harmful electrical surges. Standing arcs of brilliant blue current had been observed upon the surface of loose pipe joints during solar flares and strong auroral episodes.

Few writers have discussed the intermittent effects of solar flares on atmospheric pressure. The sudden changes noted in air pressure, which cover many thousands of square miles, are obviously sourced in the solar wind. The effect of this natural atmospheric assault has defined and disturbing influence on both the weather and human behavioral patterns. Some 139 solar flares were recorded between 1980 and 1983. There is a statistical 155-day periodicity in solar flares, a rhythm often violated by several interstitial flares. Principally used for predicting their expectable effect on radio communications, specific military observers monitor solar flares with continued concern. Correlations of flares with jet stream behavior is strong.

Jet stream behavior, in its meanderings and undulations across vast geographic regions, is not mysterious when considering the intermittent effect of solar flares and the normal “background” bursting of the solar wind. Traveling at thousands of miles per hour, flare pressures a periodically barrage the neutral atmosphere. The explosive influence of vast power shocks the entire weather system, electrically active flare disturbances violently disrupting all atmospheric processes. The very obvious outlines of flare contacts with the atmosphere can be traced as major pressure changes on weather maps. Solar flare impacts strike the earth like a bell. Auroras result, and have been correlated with thunderstorm activities.

But continual minor background disruptions also exist, propelled by the sun. In its normal process, solar expulsions do not arrive at the atmospheric boundaries as a homogeneous pressure wave. The arrival of solar products comes as a pressure wave of inconsistent density. This intermittent barrage induces harmonic atmospheric disturbances, which continually modify and chaoticize emerging weather patterns. The effect is exactly like “thrumming” an evenly sanded drumhead with innumerable impacts. This imprint of “background” pressure waves, rattling daily upon the atmosphere from solar winds, can be seen as “Chladni” patterns on weather maps.

Both solar flares and the normal thrummings of the solar wind generate infrasonic pulses throughout the atmosphere. The infrasonic shockwaves of the aurora are normally not heard, but definitely sensed. Measurements have registered a continual infrasonic background noise level. This pressure energy emanates “from above” atmospheric strata, radiating downward in large patterns.

Atmospheric infrasound is most strongly measured during daytime hours, a clear indication of their source in the intermittent expulsions of solar wind. Atmospheric infrasounds arrive at measuring stations with pitch between 0.67 and 1.5 cycles per second. Their pitch continuously oscillates between 0.67 and 0.83 cycles per second. These solar sourced infrasonic impacts very definitely correlate with sudden swings in human behavior, having very obvious sociological implications. The energetic content of atmospheric infrasound represents a vast and untapped potential.


Infrasound moves, unaffected, through and across both winds and storms. But wind and storm can generate infrasound. The powerful harmonic rotations of storms shears the atmosphere, radiating a cyclonic series of expanding infrasounds. The sense of impending fear, which proceeds hurricanes, is due to infrasonic emissions. The infrasound of seasonal winds and weather patterns produces illness in certain persons. Some individuals can hear the jet stream and its thunderous pitch, peaking between 30 and 40 cycles per second. More and more populations are reporting the persistence of ultralow pitch sounds, which render them weak and fatigued. Having often unexplained sources, we find the bibliography flooded with cases of persistent “atmospheric … and underground sounds”.

Victims of such infrasonic assaults report severe stomach upsets associated with such infrasounds. Persons who report these persistent “underground” rumbles often live in a very localized region. These loci have been as small as six miles in diameter. Wind shear action between the rapid jet stream (0.75 miles per second) and more quiescent lower air strata might continuously generate this persistent infrasound. Natural infrasonic generation is difficult to determine in all cases where it has been detected. Clashing winds may produce such sustained low pitches by misunderstood “shearing” actions, similar to Von Karrman vortices.

Wind shearing may be modified by local topology. Mountain ranges of specific geometry may offer the most plausible explanation for infrasound in certain areas. Their obstructive presence among regionally prevailing winds may produced sustained aerial vortices from which infrasounds continuously radiate.

Why however does the infrasound focus on certain ground points? Some theorists claim that wind enters caverns, producing an immense artificial whistle of infrasonic resonant pitch. Careful examinations of these caverns reveal infrasonic pitch of 20 to 30 cycles per second, which does not “register” on tape recordings. Some have suggested that these infrasounds are only sensed in physiology, being “electrostatic” in nature. They also claim that the incidence of ground-focusing infrasound is an electrical manifestation, the result of emerging terrestrial charges in highly localized regions.

How does sustained infrasound affect manmade structures? Gusting wind has often applied such instantaneous pressure to manmade artifice that strong rock walls fall flat in tiny pieces. These sudden events often occur when winds seemingly ceased for an instance. During that brief interval, windows are often blown through, and walls are toppled by infrasonic impulse.

What is the sustained influence of infrasound on humans and human behavior? Mysterious desert humming sounds fill the night of nomads with superstitious dread. Deep, buzzing, and threatening, these continuous humming tones have produced anxiety and fear among bedouins for centuries. The “ghost wails” appear in the mythology and folktales of the desert people. But these deep and virtually inaudible humming tones are not confined to the desert plains, where they thrash among themselves across sandy dunes. The Mistral, the northward winds of the African continent, sweeps over the southern Mediterranean coastlands during late fall. These familiar hot winds emerge from their desert journeys with a strange power, lasting throughout the winter. These winds leave an indelible trace among exposed communities, a phenomenon that has been misunderstood for centuries.

The Mistral, weak in infrasonic intensity, does not wreak havoc with material structures. But the Mistral works its permeating harm nonetheless. For the inhabitants of certain coastal areas, the low intensity infrasound of the Mistral brings with it a peculiar seasonal anxiety and depression. In certain locations across the Mediterranean coastland there are individuals who suffer from “seasonal nervous exhaustion” and other “neurophysical maladies”. It is known that whenever the Mistral blows, there will be increased emotional tension, depression, and irritability. The Mistral, in numerous cases, has produced fatalities.

Infrasound travels long distances, often exceeding one thousand miles, with virtually no attenuation. Its pressures thus arrive at great distances with the same force and intensity as when generated. A deadly pressure. The atmosphere sustains prolonged and powerful infrasonic vibrations. How natural conditions can systematically modify human behavior for protracted seasonal periods is frightening. How natural conditions can systematically modify large-scale social behavior for protracted seasonal periods is equally frightening. Not much acoustic power is required for infrasound to produce such extreme and sustained physiological symptoms.

Fohn winds are dry and warm southerly winds, which traverse the Alpine regions of Europe. Fohn weather is characterized by clear skies, high visibility, and dry atmosphere. Studies of “Fohn weather” and the Mistral alike have revealed some intriguing and frightening statistical correlations. The biological effects of both Mistral and Fohn weather have been well documented. These include extreme irritability, accident-prone loss of objective judgment, slight disorientation, mild nausea, and diarrhea.

It is an established fact that sustained low intensity infrasound alters human behavior and health. Higher accident rates are correlated with pre-Fohn weather onset. This high accident rate rises until the establishment of Fohn weather, having been attributed to the infrasonic content of the winds.


Vibrating manmade structures stimulate the artificial generation of dangerous infrasound. When turns are made at 60 miles per hour, car chassis vibrations produce a peak infrasonic emission. Travel sickness can be associated with prolonged infrasonic exposure to any vibrating chassis. Cars, buses, trains, motorcycles, and jets alike each register hazardous intensities of infrasound. Each transportation mode has its characteristic infrasonic pitch, the necessary outcome of mechanical frictions and inertial resistances.

There is difficulty in recording and reproducing ultra deep tones for study and analysis. They have to be generated on site for experimental purposes. Theater-sized sound systems can never completely transmit all of the sensations associated with naturally occurring infrasound. But there have been instances where audiences have become frighteningly ill because of the accidental generation of infrasound in a theater space.

Of critical importance is the comprehension of human tolerances to infrasound. Military medical teams have long studied the effect of machine vibration on human judgment and behavior out of necessity. If jet pilots and rocket pilots alike evidence even minor errors in judgment through their exposure to infrasound, disaster can result. Certain critical errors in judgment and accuracy have in fact been noted during short flight times.

The powerful infrasonic vibrations of jet chassis absolutely saturate the bodies of pilots. Continually saturated with these infrasonic energies throughout their flight time, pilot reflexes are severely diminished. Military procedure recognizes this factor, and routinely limits flight time. It is known that excess infrasonic exposures endanger pilots and their flight missions. Pilot damaging effects include decrements in vision, speech, intelligence, orientation, equilibrium, ability to accurately discern situations, and make reasonable decisions.


The Cold War was on. The United States alone held the dread secret. The most terrible weapon yet developed was the private property of one government. The mere existence of the atomic bomb was threat to nations whose motives were not entirely altruistic. Motivated, aggressive, and imperialistic, obtaining atomic bomb data was a priority for several nations. The only manner in which some nations obtained the secret was by stealing it. When Stalin’s science officers finally developed an atomic duplicate of the American bomb, pressure suddenly was placed upon every other European nation to achieve an equivalent or better device.

When one seeks to defend one’s borders, the consequences of releasing weapons of devastation to the world do not seem important. Weaponry is death-oriented by nature. But there are moral differences between weapons of defense and weapons of offense. Previous to this atomic proliferation, competing nations concentrated their weapons research on truly bizarre and equally deadly means for defending their national boundaries. A great variety of such deadly weapons were perfected in rapid succession. This included deadly variations and combinations of gas weaponry, pathogenic agents, and radiant weaponry. Stalin’s research teams investigated psychic powers as a possible means for destroying an enemy. Psychotronic warfare was devel­oped among numerous groups, both private and national, with measurable success. Information on some simpler psychotronic weapons has recently been obtained through an increasing process of Soviet disclosure.

In truth, the larger the weaponry the less safe the national boundaries truly were. While the superpowers concentrated their weapons development programs on mass-destructive nuclear weaponry, others focused on more practical conventions. The limited tactical warfare of small battlefields seemed a more immediate need. While developing their own atomic device, France sought defensive tactical weaponry on every possible technological front. Short-range weapons would best defend against a conventional national assault. But other systems were also sought; systems which, though non-nuclear, were equally invincible. As the great Frankish Knight, Charles “the Ham­mer” Martel repelled ruthless invaders from the medieval east, so a new ham­mer would be sought to defend France against possible new enemies from the east. Even as Charles Martel arose from obscurity, so this strange new “hammer” would arise in equal obscurity.


The central research theme of Dr. Vladimir Gavreau was the development of remote controlled automatons and robotic devices. To this end he assembled a group of scientists in 1957. The group, including Marcel Miane, Henri Saul, and Raymond Comdat, successfully developed a great variety of ro­botic devices for industrial and military purposes. In the course of develop­ing mobile robots for use in battlefields and industrial fields, Dr. Gavreau and his staff made a strange and astounding observation, which, not only interrupted their work, but became their major research theme.

Housed in a large concrete building, the entire group periodically experienced a disconcerting nausea, which flooded the research facility. Day after day, for weeks at a time, the symptoms plagued the researchers. Called to inspect the situation, industrial examiners also fell victim to the malady. It was thought that the condition was caused by pathogens, a “building sick­ness”. No such agencies were ever biologically detected. Yet the condition prevailed. Research schedules now seriously interrupted, a complete exami­nation of the building was called.

The researchers noticed that the mysterious nauseations ceased when cer­tain laboratory windows were blocked. It was then assumed that “chemical gas emissions” of some kind were responsible for the malady, and so a thor­ough search of the building was undertaken. While no noxious fumes could be detected by any technical means, the source was finally traced by building engineers to an improperly installed motor-driven ventilator. The engineers at first thought that this motor might be emitting noxious fumes, possibly evaporated oils and lubricants. But no evaporated products were ever detected. It was found that the loosely poised low speed motor, poised in its cavernous duct of several stories, was developing “nauseating vibrations”.

The mystery magnified for Dr. Gavreau and his team, when they tried to measure the sound intensity and pitch. Failing to register any acoustic readings at all, the team doubted the assessment of the building engineers. Never­theless, closing the windows blocked the sense of nausea. In a step of bril­liant scientific reasoning, Gavreau and his colleagues realized that the sound with which they were dealing was so low in pitch that it could not register on any available microphonic detector. The data was costly to the crew.

They could not pursue the “search” for long time periods. During the very course of tracking the sound down, an accidental direct exposure rendered them all extremely ill for hours. When finally measured, it was found that a low intensity pitch of a fundamental 7 cycles per second was being produced. Furthermore, this infrasonic pitch was not one of great intensity ei­ther. It became obvious that the slow vibrating motor was activating an infra­sonic resonant mode in the large concrete duct. Operating as the vibrating “tongue” of an immense “organ pipe”, the rattling motor produced nauseat­ing infrasound. Coupled with the rest of the concrete building, a cavernous industrial enclosure, the vibrating air column formed a bizarre infrasonic “amplifier”.

Knowledge of this infrasonic configuration also explained why shutting the windows was mildly effective in “blocking the malady”. The windows altered the total resonant profile of the building, shifting the infrasonic pitch and intensity. Since this time, others have noted the personally damaging effects of such infrasonic generation in office buildings and industrial facili­ties. The nauseating effects of exposure to a low intensity natural or manmade infrasonic source is now well appreciated.

It has become a routine architectural procedure to seek out and alter any possible such resonant cavities. The sources often appear in older buildings, the result of construction rendered faulty by previous lack of this knowledge. All such “improper” architectural formats are modified by the additions of sound-blocking materials.


Dr. Gavreau and his research team now carefully investigated the effects of their “infrasonic organ” at various intensity levels and pitch. Changing the spring tension on shock mounts, which held the fan motor, it was possible to change the pitch. Various infrasonic resonances were established throughout the large research building. Shutting the windows blocked most of the symptoms. When the window was again opened, however weak as the source was made, the team felt the nauseating effects once again. In the business of mili­tary research, Dr. Gavreau believed he had discovered a new and previously “unknown weapon” in these infrasounds. Aware of the natural explosives by which infrasonics are generated, Dr. Gavreau began to speculate on the ap­plication of infrasonics as a defense initiative. The haphazard explosive ef­fects of natural infrasound in thunderclaps were quite effective in demon­strating what an artificial “thunder-maker” could do. But, how could a thun­derclap be artificially generated in a compact system? These thoughts stimu­lated theoretical discussions on the possibility of producing coherent infrasound: an infrasonic “laser”.

The first devices Dr. Gavreau implemented were designed to imitate the “accident” which first made his research group aware of infrasonics. They designed real organ pipes of exceedingly great width and length. The first of these was six feet in diameter and seventy-five feet long. These designs were tested outdoors, securely propped against protective sound-absorbent walls. The investigators stood at a great distance. Two forms of these infrasonic organ pipes were built. The first utilized a drive piston, which pulsed the pipe output. The second utilized compressed air in a more conventional manner.

The main resonant frequency of these pipes occurred in the “range of death”, found to lie between three and seven cycles per second. These sounds could not be humanly heard, a distinct advantage for a defense system. The effects were felt however. The symptoms come on rapidly and unexpectedly, though the pipes were operating for a few seconds. Their pressure waves impacted against the entire body in a terrible and inescapable grip. The grip was a pressure which came in on one from all sides simultaneously, an enve­lope of death.

Next came the pain, dull infrasonic pressure against the eyes and ears. Then came a frightening manifestation on the material supports of the device itself. With sustained operation of the pipe, a sudden rumble rocked the area, nearly destroying the test building. Every pillar and joint of the massive struc­ture bolted and moved. One of the technicians managed to ignore the pain enough to shut down the power supply.

These experiments with infrasonics were as dangerous as those early investigations of nuclear energy. Dr. Gavreau and his associates were dangerously ill for nearly a day after these preliminary tests. These maladies were sustained for hours after the device was turned off. Infrasonic assaults on the body are the more lethal because they come with dreadful silence. The eye­sight of Dr. Gavreau and his fellow workers were affected for days. More dangerously were their internal organs affected: the heart, lungs, stomach, intestinal cavity were filled with continual painful spasms for an equal time period.

Musculature convulses, torques, and tears were the symptoms of infra­sonic exposure. All the resonant body cavities absorbed the self-destructive acoustic energy, and would have been torn apart had the power not been extinguished at that precise moment. The effectiveness of infrasound as a defense weapon of frightening power having been demonstrated “to satisfaction”, more questions were asked. After this dreadful accident, approaching the equipment once again was almost a fearful exercise. How powerful could the output of an infrasonic device be raised before even the operating engi­neers were affected?

With greatest caution and respect for the power with which they worked, Dr. Gavreau began recalculating all of his design parameters. He had grossly misjudged the power released by the pipes. He had, in fact, greatly lowered those calculated outputs for diagnostic purposes. Never had he imagined that these figures were actually far too great in the world of infrasound!

Empirical data being the only way to determine how infrasonic energy correlated with both biological and material effect, the tests were again attempted with a miniature power supply. First, the dimensions of these devices had to be greatly reduced. Their extreme length was objectionable. In order to provide absolutely safe control of the deadly blasts, several emergency cutoff switches were provided. These responded to the radiated infrasonic pressure wave. The intensity could be absolutely limited by use of automated barometric switches.

In an attempt to achieve more compact and controllable infrasound generators, Dr. Gavreau designed and tested special horns and “whistles” of vari­ous volumes. These were each remarkably simple flat circular resonant cavi­ties, having a side output duct. They were simply the large analogues of fog­horns and police whistles. These flat forms were volumetrically reduced in successive design stages because it was found that their output was far too great. The infrasonic foghorns could produce a frightening two kilowatts of infrasonic energy, at a pitch of one hundred fifty cycles per second.

The flat “police whistles” were more easily designed to required specifications. Their overall characteristics were quite simple to determine, a math­ematical formula being devised for the purpose. The whistle’s resonant pitch was found by dividing its diameter into a numerical constant of 51. Increas­ing the depth of the whistle effectively increased its amplitude. A whistle 1.3 meters in diameter produced an infrasonic pitch of 37 cycles per second. This form violently shook the walls of the entire laboratory complex, though its intensity was less than 2 watts infrasonic power.


Not much amplitude is required for infrasound to produce physiological malady. Several researchers accidentally did themselves great harm when, by deliberate intent or accident, they succeeded in generating infrasonic vibrations. Tesla used vibrating platforms as an aid to vitality. He delighted in “toning the body” with vibrational platforms of his own design. Mounted on heavy rubber pads, these platforms were vibrated by simple motorized “eccentric” wheels.

Their mild use, for a minute, could be pleasantly stimulating. The effects invigorating the whole body for hours thereafter. Excessive use would produce grave illness however, excessive aggravations of the heart being the most dangerous aspect of the stimulation. The entire body “rang” for hours with an elevated heart rate and greatly stimulated blood pressure. The effects could be deadly.

In one historic instance, Samuel Clemens, Tesla’s close friend, refused to descend from the vibrating platform. Tesla was sorry he had allowed him to mount it. After repeated warnings, Tesla’s concern was drowned out by both the vibrating machine and Clemens’ jubilant exaltations and praises. Several more seconds and Clemens nearly soiled his white suit, the effects of infrasound being “duly recorded”.

Tesla often went to great lengths in describing the effects of infrasounds to newspaper reporters who, behind his back, scoffed at the notion that a “little sound” could effect such devastations. Yet, it was precisely with such a “little sound” that Tesla nearly brought down his laboratory on Houston Street. His compact infrasonic impulsers were terribly efficient. Tesla later designed and tested infrasonic impulse weapons capable of wrecking buildings and whole cities on command.

Walt Disney and his artists were once made seriously ill when a sound effect, intended for a short cartoon scene, was slowed down several times on a tape machine and amplified through a theater sound system. The original sound source was a soldering iron, whose buzzing 60-cycle tone was lowered five times to 12 cycles. This tone produced a lingering nausea in the crew, which lasted for days.

Physiology seems to remain paralyzed by infrasound. Infrasound stimu­lates middle ear disruptions, ruining organismic equilibrium. The effect is like severe and prolonged seasickness. Infrasound immobilizes its victims. Restoration to normal vitality requires several hours, or even days. Exposure to mild infrasound intensities produces illness, but increased intensities re­sult in death. Alarming responses to infrasound have been accurately recorded by military medical experts. Tolerances from 40 to 100 cycles per second have been recorded by military examiners. The results are sobering ones. As infrasonic pitches decrease, the deadly symptoms increase. Altered cardiac rhythms, with pulse rates rising to 40 percent of their rest values, are the precursors to other pre-lethal states. Mild nausea, giddiness, skin flushing, and body tingling occur at 100 cycles per second. Vertigo, anxiety, extreme fatigue, throat pressure, and respiratory dysfunction follow. Coughing, se­vere sternal pressure, choking, excessive salivation, extreme swallowing pains, inability to breathe, headache, and abdominal pain occur between 60 and 73 cycles per second. Post exposure fatigue is marked. Certain subjects contin­ued to cough for half an hour, while many continued the skin-flush manifes­tation for up to four hours.

Significant visual acuity decrements are noted when humans are exposed to infrasounds between 43 and 73 cycles per second. Intelligibility scores for persons exposed, fall to a low of 77 percent their normal scores. Spatial orientation becomes completely distorted. Muscular coordination and equilibrium falter considerably. Depressed manual dexterity and slurred speech have been noted before individuals blackout. Just before this point, a significant loss in intelligibility is noted.

The findings of Dr. Gavreau in the infrasonic range between 1 and 10 cycles per second are truly shocking. Lethal infrasonic pitch lies in the 7-cycle range. Small amplitude increases affect human behavior in this pitch range. Intellectual activity is first inhibited, blocked, and then destroyed. As the amplitude is increased, several disconcerting responses had been noted. These responses begin as complete neurological interference. The action of the medulla is physiologically blocked, its autonomic functions cease.


Infrasound clings to the ground, a phenomenon well known in the animal world. Female vocalizations and those of their young, take their traceable routes through the air. High-pitched sounds are aerial in nature. This makes females and young natural targets for predators. Low-pitched tones cling to the ground, being “guided” along the soil layers. Male vocalizations cannot be localized by predators. Male sounds “hug the ground”, diffusing out from their source. Some males rumble the ground with voice and hooves. These are communications signals, which they alone comprehend.

The fact that the ground draws and guides low frequency tones is a remarkable gift to the animal kingdom, enhancing the survival of male leaders. When herds are attacked by predators, the males can continue to give guid­ance to their companions, while remaining completely “invisible” and elusive. Predators cannot locate the voices and rumblings of male leaders be­cause their low-pitched signals are impossible to pinpoint. They are therefore also impossible to attack. Predators are often overtaken by the males who maintain their diffusive communications across and through the ground.

The same analogies would apply to an infrasonic defense system. First, infrasound does not lose its intensity when traveling very long distances across the ground. They remain at the same intensity as when released from their deadly sources. Also, because of the ground clinging effect, infrasonic sources cannot be located without special appliances. This would work well for those who used the weaponry of infrasound. But suppose some hostile force were themselves using infrasonics?

Infrasonics are inaudible. The battle would be over before anyone knew it had begun. How would one know of an infrasonic attack? The first line of defense would therefore be the detection of the “unperceived enemy”. The development of an adequate infrasonic weap­ons systems would first require an infrasound detector.

Dr. Gavreau first concentrated on developing infallible infrasonic detectors for the personal safety of his operators as well as for eventual tactical deployment. He experimented with several designs which followed the ar­cane analogues of old wireless detectors. One such design used enclosed flames to detect infrasonic pitches. They were reminiscent of those flame detectors developed by Lee De Forest just before his invention of the triode. The flame detectors of Gavreau employed variable resonant cavities. Flame amplitudes shifted with specific infrasonic pitches. He could calibrate the infrasonic intensity as well as the pitch with these detectors. But, flames are dangerous and fickle, not being very reliable in battle.

Dr. Gavreau next experimented with enhanced mechanical barometers. These coupled large resonant cavities with very fine barometer tubes. They displayed great sensitivity. Steady increases in barometric pressure were reg­istered when large cavity bellows were compressed by infrasounds. The sen­sitivity of these barometers increased as the bellows capacity was increased. They were adequate, but frail.

Another embodiment resembled the early mechanical television designs of John Logie Baird. It utilized large tympani skins, mirrors, lights, and pho­tocells. A mirror was fastened to the tympanum. A light beam flickered when infrasound struck the mirror. The photocell recorded these flickers as an electrical signal. This detector system was very reliable.

By far, the most advanced detectors, which Gavreau designed and tested, utilized an electrolytic process. In this analogue of systems developed by Fessenden to measure faint wireless signals, chemical solutions and fine wire point electrical contacts were used. Chemical solutions, separated by an osmotic barrier, were forced to migrate through the barriers whenever infrasound traversed the system. This chemical mixture was then measured as an increased electrical conductivity in a sensitive galvanometer. This system was reliable and accurate. All of these systems suffered from one possi­bility. The offensive use of an incredible infrasonic amplitude would burst them into vapor.


Claims were issued by French authorities, stating that Dr. Gavreau was not developing weapons at all. Several patents, however, betray this conspicuous smoke screen. While it is impossible to retrieve the actual patents for the infrasonic generators, Dr. Gavreau is credited with extensive development of “infrasonic armor”. Why would he “waste” such time and expense if not for an anti-weapons program?

Thus use of infrasonic weaponry necessitates the development and implementation of infrasonic shields. Dr. Gavreau spent more time developing infrasonic shields than on developing efficient infrasonic horns. Infrasound could not adequately be blocked, as Dr. Gavreau discovered early in his research. Infrasonic devices require extremely large baffles.

Furthermore, no one would dare initiate an infrasonic barrage on any invasive force without adequate protection. Infrasonic horns can project their sounds in a given direction, but natural environments “leak” portions of the sound in all directions. Infrasounds saturate their generators, flooding and permeating their sources in a few seconds. They “work their way back” to­ward those who dispatch their deadly signals. Infrasounds “hug the ground” and spread around their sources. Unfortunately, those who would release infrasonic energy would themselves be slaughtered in the very act.

The first method of Gavreau involves the conversion of infrasound into successively higher pitches, until the infrasonic pitch is “lost”. This was achieved in his passive “structural” method, an enormous layered series of baffles and resonant cavities. This form is “passive” since it merely stands and waits for infrasonic barrages, absorbing and converting them into harm­less audible tones.

The second method of Gavreau is more active and “aggressive”. It ac­tively engages and nullifies any offensive infrasonic power. The nullifier uses a well-known physical principle for its operation. As an “active” shield, it transmits tones whose opposing wave fronts destructively interfere with in­ coming infrasound. Infrasonic attacks are nullified, or at least brought to much weaker levels.

This method requires high-speed detection and response systems. The process involves determination of an attack pitch, generation of the same, and projection of the pitch “out of phase”. The active nullifier method is not completely accurate or protective by any means. A highly modulated, mobile infrasonic source would be nearly impossible to successfully neutralize without extremely sophisticated electronics.

But an elegantly simple approach was imagined, one which would not require the defender to be exposed to his own infrasonic projections. While fixated on the old notion of gun installations and stations, Gavreau and the team had momentarily forgotten their first research endeavor. Robotics!


Let us recall that Dr. Gavreau and his team of pioneers were in the business of robotics. They developed industrial and military automaton systems. How difficult would it have been to couple his newfound weaponry with robotic applications? Dr. Gavreau combined the organ pipe and whistle for­mat. The device was housed in a block of concrete. It was less than a cubic meter in volume. The primary whistle was poised within its interior. At its flared opening were placed several resonant pipes. The device was operated by highly compressed air. Its output was frightful. It was capable, in a con­ventional engagement, of utterly destroying an aggressor.

This infrasound whistle design was once sealed in an 880-pound concrete pier for tests, a concrete baffle placed over its projective end. Even with these precautions, the device succeeded in absolutely shaking a fan-shaped por­tion of Marseille. It broke through its supportive concrete pier and destroyed the baffle covering in an instant. Macabre. No sound was ever heard.

This design demonstrated great pitch selectivity, power, and directivity. In this last feature, Gavreau and his team achieved a safety factor of greatest value. Infrasonic defensive armaments could now be safely directed away from the operators against any foe. This weapon was a remarkably compact and efficient device. Its efficiency was gauged by the destructive output and the weapon volume.

A later embodiment of this terror disclosed another compact cube. The infrasonic whistle was presumably housed therein. Proceeding from the front plate were some sixty pipes, flared horns aimed in deadly forward array. It was said that this device alone, remotely guided into an arranged artificial battlefield, burst heavy battlements and tank interiors open with a hideous effortlessness. In addition, several other more frightening and unmention­able disruptions were observed with equal effectiveness. In each, not a sound was ever heard.

The device was mounted and mobilized. A robotic vehicle. Powered by diesel engines or compressed gas, the almost insignificant unit would be a bizarre foe for an army to engage. Preliminary experiments had proven the extreme danger of loosing infrasonic power among Gavreau and his work­ers. Without automatic remote control mechanisms each technician would succumb to the deadly sound and die, while the machine kept broadcasting its deadly sound. As defensive weaponry, such a device would be terrible and effective. The system would be a true deterrent for those who would be fool­ish enough to attempt ground assault on any nation so armed. Armies would fall flat. Once the infrasonic horns were unleashed against the foe, the battle would not even begin.

Such a war engine would be impossible to locate. None who saw its size would believe it to contain such a lethal power. Most would overlook the device completely. A flood of such devices, each emanating a peculiar highly modulated blend of infrasound, would be an unstoppable wall. Robotic tanks equipped with infrasonic generators could sweep an area with deadly infrasound, destroying all opponents to within a five mile radius. These ter­rible infrasonic weapons could easily be secured in drone jets, where aerial assaults could quickly and methodically waste any offensive approaching army.

Deterring would-be aerial attackers could be equally devastating for the offenders. Infrasonic beacons could sweep and scan the skies with a deadly accuracy. Infrasound passes through all matter with equal effectiveness, seek­ing out offenders with deadly consequence. The intensities which the Gavreau devices effectively broadcast into the environment are frightening. In these devices we see the perfection of phenomena, which never naturally occur in such dangerous intensities. This is why these weapons must be deployed by remote control, operating as automatons at great distances from their operators.

Weapons are made to defend, not to offend. In Gavreau’s own words: “There does not exist complete protection against infrasound. It is not ab­sorbed by ordinary matter, walls and chambers do not suffice to arrest it”. And so, once again, we stand at the crossroads. We are called, summoned to appear before two pathways. On the one, we hear Messaien and the musical messages of peace. On the other, Gavreau and the musical messages of war. And again we choose. And again we must choose. Whose music will it be?

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