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In this website they are describing the taos hum, its possible causes, medical explanations and conspiracy theories.They are also saying about the source of hum in case of bristol and kokomo industrial equipment are suspected also the electric pipe lines. Hum also have some medical explanation Tinnitus is one potential cause of the preception of sound when no other external sound is present. It believed that the thoses people that can hear that noise like the taso resident have more strong hearing and those people able to pick those sound which is not hear by all people.The conspiracy theorie slike High Frequency Active Auroral Research Program, or HAARP is the government  agency which conduct that the formation is due to earth ionosphere.

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The Taos Hum

Taos is a small town in north-central New Mexico. To a passerby, it might not seem all that different from any other quiet American town. Listen carefully though, and you may find that Taos isn't so quiet after all. Since the early 1990s, some residents and visitors of Taos have reported hearing a constant low-frequency buzzing or rumbling noise. We present to you the Taos Hum.

The Taos Hum has been described as a faint droning sound, similar to a diesel engine idling in the distance. It is a miserable noise for those that can hear it. It never stops, interferes with sleep, and is more noticeable at night and indoors.

The Hum became so bothersome to Taos residents that in 1993, locals voiced their concern about it to Congress. A public study was conducted to examine what could be going on. Residents were interviewed and various sound detection instruments were placed around the town.

The study found that only about 2 percent of Taos residents reported hearing the Hum. Many affected residents could replicate the sounds they heard, but no such signals were ever detected. The only unusual activity observed was elevated electromagnetic field levels, but this was determined to be the result of local power lines. No source of the Hum was ever identified.

Hums Around The World

Taos is not necessarily special when it comes to strange, mysterious humming sounds. There have actually been several similar cases around the world, many of which remain unexplained to this day.

During the late-1970s, residents of Bristol, England, were among the first people to report hearing a steady humming sound in the distance. In 1980, Bristol's environmental health officers used noise monitoring equipment to try to track down the source. Though it was eventually blamed on automobile traffic and local factories, reports of the Hum continue to this day, some 40 years later.

The beachfront neighborhood of Bondi in Sydney, Australia, has also had a Hum for several years. As one resident told Australia's Daily Telegraph, "It sends people around here crazy, all you can do is put music on to block it out. Some people leave fans on."

A few years ago in Kokomo, Indiana, hundreds of residents reported hearing a Hum, and the city's municipal government commissioned a study to investigate in 2003. Despite concluding the Hum was caused by nearby industrial noises, reports of the sound continued even after noise restrictions were placed on the suspected factories.

Possible Causes

So what really is causing this mystery Hum? Well, it's important to remember that sound is all around us. Most of it goes unnoticed until we start paying attention to it, and there are easily hundreds of possible explanations. Most researchers do feel fairly certain that the Hum is real, though there is no consensus on a direct cause.

Industrial equipment is often the first suspected source of the Hum, as was the case in Bristol and Kokomo. Other possible explanations include high-pressure gas lines, electrical power lines and wireless communication devices. There's also a theory that the Hum could be the result of low-frequency electromagnetic radiation which is only audible to some people. Other environmental factors have also been blamed, including seismic activity like microseisms, which are very faint, low-frequency tremors that can be generated by the action of ocean waves.

Medical Explanations

Since it's been hard to verify environmental causes, some have offered medical explanations for the Hum. Tinnitus is one potential cause. This is the perception of sound when no external noise is present. Testing has shown that many Hum hearers, however, have normal hearing.

Some have also proposed that people who can hear the Hum, like those in Taos, might have unusually strong hearing and are able to pick up noises that most other humans cannot. It's also possible the Hum is simply an auditory hallucination. Some of the Taos Hum hearers, for example, have reported hearing it even after they have moved out of the area.

Conspiracy Theories

Of course, any time there is an unexplained phenomena in science, conspiracy theories are sure to follow.

Some believe the Hum is the result of military experiments or submarine communications. The High Frequency Active Auroral Research Program, or HAARP, has also been a popular target of conspiracy theorists. Some believe this government agency, which conducts research on Earth's ionosphere, is conducting experiments which create the Hum (interestingly, conspiracy theorists also claim HAARP can manipulate weather) .

And then there is the age-old culprit for anything unexplained - Aliens.

The Mystery Continues

Is an Alien spaceship hovering over Earth the real cause of the Hum? Unlikely.

As with most things in science, just because something is unexplained, doesn't mean it never will be. There are various potential causes of this strange noise, and in each case, there may be different explanations. Whether the Taos Hum is real, or just a product of human imagination, will be best solved by further research down the line.

For now though, the Hum will remain a mystery.

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Unexplained Noises - What is the Taos Hum? | Sporcle Blog

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Taos is a small town in north-central New Mexico. To a passerby, it might not seem all that different from any other quiet American town. Listen carefully though, and you may find that Taos isn't so quiet after all. Since the early 1990s, some residents and visitors of Taos have reported hearing a constant low-frequency buzzing or rumbling noise.

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In this Piacture scientists are reviewing the latest grpahs coming frm the most  mysterious forest  where the taos hum can heard.They are trying to describe that it is not a frequency that occur from the earth disaters or any other occurance.Earths clamor takes after the low frequency roll always present on the plane, such a wander can be recorded not with standing when threr is no earthquake. Typically this marvel mus be recognized with exceptionally touchy seismometers

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In this website they are trying to expain about the attributes and source fromation and they said that the source of taos hum still remains a mystry.This exhibits a logical research by Joe Mullins and Jim Kelly of the College of New Mexico distributed on November 22, 1995. Attributes was first one is hum is selective and the second is that it can be perceive by the hearers on weekly basis. Third one desccribe the source of the hum is widespread since the hearers perceive ot thouroghout the taos area and last one is source describe differently that it is low in frequency from the idling truck or high power audio bass.Hearers after verfing the frequening ranges from 30 hz to 80 hz. They was redicting that it can be happen due to the US navy ELF stations.But it is not proved right so it still reamins a mystry.

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STRANGE SOUNDS - AMAZING, WEIRD AND ODD PHENOMENA

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The Taos Hum is an elusive low-frequency humming noise heard in Taos New Mexico! But its source remains a mystery!

Attention is focussing on individuals in and around Taos, New Mexico who perceive an irritating low frequency sound that has come to be known as the Taos Hum.

This article presents a scientific research by Joe Mullins and Jim Kelly of the University of New Mexico published on November 22, 1995.

There have been persistent complaints of annoying low frequency sounds in the USA and other countries but the group of "hearers" in Taos has been particularly outspoken. In 1993 they got the attention of the New Mexico congressional delegation resulting in a request for an investigation. Many Taos residents feel that the government may somehow be involved in the sound, so the investigation was open and public.

The Taos Hum may be best described with the following attributes:

First, the hum is selective. Only a small percentage of Taos residents perceive it.

Second, the hum is persistent since most hearers perceive it on a weekly basis.

Third, the source of the hum must be widespread since hearers perceive it throughout the Taos area. Moreover, all the country describes a similar phenomenon.

Fourth, the hum is invariably described as low in frequency and reminiscent of a distant pump, an idling diesel truck, or perhaps someone's high powered audio bass running amok.

Hearers who are musicians identify the hum as a modulated tone near Eb (41 Hz) and those with some technical background identify it as an amplitude modulated sound with a carrier frequency ranging from 30 to 80 Hz.

This is a video with the original sound of the recordings from 22. Jan. 2009, 01:24am CET/CEWT:

The Taos Hum Experiments

1. Hearers

These anecdotal descriptions of the hum have been tested with psychophysical matching tests using known hearers. The hum matching tests were made with ten hearers. The equipment was set up in the bedroom of a guest house near the Taos residence of Bob and Catanya Saltzman, two hearers who had been instrumental in getting the investigation started.

Scientists built a custom microphone from an 18 inch woofer to serve as an ultra-sensitive low frequency sound detector. (-60 dbSPL from 8 to 80 Hz). The output of this "big ear" was fed to recording and analyzing equipment housed in an RV some distance away.

To keep the tests as simple as possible, researchers used a modulated sine-wave source and a low frequency speaker to generate matching sounds. Eight of the ten hearers were able to generate a sound which matched the hum they were perceiving . An individual hearer matched the same sound to the perceived hum quite reproducibly. Surprisingly, many hearers reported beats between the speaker-generated sound and the hum implying the physical existence of a second tone. The results of these tests were both intriguing and puzzling. The carrier frequencies selected by the hearers ranged from 32 Hz to 80 Hz. The modulating frequencies they chose went up to 2 Hz. All chose amplitude levels near or below the known sensitivity of the ear in this frequency range. But the most striking thing is that hearers could still perceive the hum in the presence of a relatively flat noise spectrum when the matching signal was turned off.

2. Acoustic and magnetic experiments

The Saltzman's residence and the Taos golf course were selected as sites to conduct acoustic, geodynamic, magnetic and electromagnetic measurements. Additional geophone and magnetometer data were collected at other locations in and around Taos to track down the origin of a strong harmonic component in the 60 Hz power grid around Taos. At first glance this provided a possible source for the hum but hearers agreed almost universally that the perceived sound was unusually intense at a very remote site near Tres Piedras were we could find little trace of the 60 Hz magnetic component.

Measurements made with magnetometers in an electromagnetically quiet area did show the Schumann resonances created by lightning-induced electromagnetic radiation trapped in the spherical wave guide formed between the ionosphere and the earth. The observed resonant frequencies of this waveguide cover the frequency range implicated in the Taos hum but they appeared to be in the normal amplitude range and we could find nothing unusual about them.
Taos is a relatively quiet seismic area so it is not surprising that geophone data showed nothing but background noise. One massive event turned out to be a determined gopher restoring a burrow obstructed by placement of the geophone. The scientists' electrostatic field detector recorded many events but all could be attributed to lightning strikes or movements of people in the vicinity. The electromagnetic data were collected from 20 Hz to 18 Ghz using an assortment of antennas and receivers. Everything that was found that could be attributed to 60 Hz power lines, electromagnetic noise or known radio and TV transmitters.

Possible Sources of the Taos Hum

Since the US Navy ELF stations in the Michigan peninsula and in Wisconsin were widely suspected to be the source of the hum, the researchers looked carefully at the 65 to 75 Hz region of the electromagnetic spectrum, the frequency range where ELF signals would be prominent. They could find nothing above the noise. Considering the spread spectrum of this broadcast, its limited antenna length and the distance from the transmitting site, it is unlikely that the signal would be above the noise level in northern New Mexico. As a result, they are left with a mystery.
There are no acoustic signals that might account for the hum nor are there any seismic events that might explain it. There are no unusual lines at suspect frequencies in the electromagnetic spectrum recorded near Taos. In fact, other than the signals generated by the power grid or in the case of the golf course, a power generator located at the course headquarters, scientists found no clear lines at all in this spectrum. At a more fundamental level, there is no known mechanism whereby weak electromagnetic signals might even be transduced selectively by the human ear and perceived as sound.
Source: The hearers themselves?

The next step, therefore, was to shift the emphasis from the physical environment to the hearers themselves. First important thing was to determine what fraction of the people in the Taos region are affected by the hum and to probe the characteristics of their perception.

To this end, survey forms concerning the hum to 8,000 residents in Taos and Ranchos de Taos and the neighboring communities of Tres Piedras, Questa, Eagle Nest and Penasco. These communities represent respectively points to the west, north, east and south of Taos on a circular perimeter roughly 40 miles with Taos at its center.
A total of 1,400 residents in these areas responded to the survey and 161 respondents were classified as hearers. Most of the hearers (72%) are between 30 and 59 years of age and there are approximately equal percentages of male (52%) and female (47%) hearers. The hum is perceived by most hearers (62%) between 8 pm and 9 am. About 80% of the hearers perceived the hum at least one a week and, as shown in fig 2 a hearer's first experience with the hum usually occurs in the immediate vicinity of Taos. It is noteworthy that 19% of the hearers perceive the hum at sites more than 50 miles from Taos.
If we assume that all hearers responded to the survey, we can estimate that the lower limit of the fractional number of hearers is about 161/8000 or approximately 2% of the population. If this ratio hold for other populations in remote or quiet rural areas we would expect that the number of hearers is very substantial in this country.$

Tinnitus?

It has been proposed that the hum might represent some kind of low frequency tinnitus arising from a disturbance in the cochlea of the inner ear. One problem with such explanations is that tinnitus itself is not well understood. Most individuals with tinnitus match the tone they perceive between 3 to 6 kHz and rarely if ever does a tinnitus sufferer match to a tone below 1 kHz. Why should such a phenomenon skip from regions of the cochlea where 3 to 6 kHz tones are represented over intermediate zones to the extreme apical end of the cochlea where the lowest frequencies of sound are represented ? Furthermore, many hearers insist that they can hear beats between their perceived tone and the objective tone generated in matching experiments. Beats have not been demonstrated conclusively in matching experiments using subjects with tinnitus.

The next goal is to compare low frequency hearing thresholds and other aspects of auditory function in hearers and non-hearers from the Taos region. Informal testing of one hearer provided a tantalizing hint that the sensitivity of hearers in the frequency range from 20 to 100 Hz may be significantly more acute than is implied by some of the widely used sensitivity curves. There we are currently developing equipment for low frequency audiomety as well as equipment to measure distortion product otoacoustic emissions generated by the ear at low frequencies. The measurement of these emissions has become standard clinical practice at frequencies above 1 kHz but to date no one has reported success in detecting evoked emissions or spontaneous emissions in the frequency rang we are investigating. The problem is that the noise floor for the usual insert microphones is very poor at low frequencies so we are using electrodynamic elements which have orders of magnitude better noise performance.
In summary, our interest remains high in finding a source for the elusive Taos hum. The character of the Taosenos and their unique town only add to the flavor of this mystery in acoustics and human hearing.

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Taos Hum - The Taos Hum Mystery - Strange Sounds

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This article presents a scientific research by Joe Mullins and Jim Kelly of the University of New Mexico published on November 22, 1995. There have been persistent complaints of annoying low frequency sounds in the USA and other countries but the group of "hearers" in Taos has been particularly outspoken.

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Taos Hum-Assignment#2
Harmanpreet singh- Working Individually

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In this Video these guys are talking about the formation of unusual irritating noise called Taos Hum.Taos Hum is a low frequency buzz noise which is noise for everyone who hear this.This noise started hearing in Taos city in mexico in the early 1900"s when number of taos residents reported of heareing a noise with no discrenible soource.Descended of taos to measure everything from seismic and electromagnetic vibrations to the sensitivity of human ear by the scienctists of state national labortories and several universities. Nobody was able to explain that noise as explain in the video.

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In this websites they are trying to expalin that it is solved that where the sound come from.They are showing us an graphs with the hearing of hum in the whole north america. A seismic observatory called the US array Earthscope encouraged another hyphothesis by estimating the power of the murmur with wave height: the crash of waves against one another and battering up against the shore of the western Joined Staes and Europe.

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In 1998, scientists discovered that the planet is constantly making a sound. This was vindicating news for a very small minority of people throughout the world who were obsessed with a low hum that seemingly only they could hear.

The phenomena of Earth's constant but quiet vibration is called simply "The Hum" for sufferers and conspiracy theorists. Reports of The Hum pop up from the 1970s all over the world, and occasionally enough people report it to cause a bit of a media stir. In the early 1990s, state-side it was the "Taos Hum" in New Mexico that became prominent followed later by the Kokomo, Indiana Hum. In 1994 it was the "Bristol Hum" in southwest England.

People who complain about hearing the hum describe it as truck motors running in the distance and usually hear the noise at night or in isolated locations. Some people even claim that the sound gives them nausea, headaches, and nosebleeds on top of being very, very unsettling. Before its existence could be proved most doctors and scientists wrote off people complaining of a constant low rumbling as victims of delusion or tinnitus (ringing of the ears).

It wasn't until 1998 that seismologists discovered the Earth is giving off very slight vibrations all the time around the range of 10 millihertz. That's frequency so low that it's supposed to be out of the range of human hearing. That hasn't stopped online communities of Hum sufferers from amassing at sites like TheHum.info where you can share your accounts of The Hum in The Hum Sufferers Database and put yourself on a world map.

After 1998, with the seismic cause isolated and the existence of an Earth Hum verified, the search for the cause of the phenomena began.

It wasn't until 2008 that Black Forest Observatory in Germany took-with supporting data from seismologists in Japan and China-to mapping the patterns of vibrations and discovered the Earths oscillations move in rings and loops over the Earth's surface. That pattern indicates a force that's moving across the planet's surface, not a force that's pushing down on the planets surface.

By 2009, there were two main theories involving the planet's oceans and The Hum. The dominant theory was that deep waves moving across the entire ocean would brush up against the natural geography of the sea floor and vibrate the planet. A seismic observatory called the USArray EarthScope furthered another theory by measuring the intensity of the hum with wave height: the collision of waves against each other and battering up against the coast of the Western United States and Europe.

The problem with both theories is that seismological data collected on The Hum produced outliers for each model. Sometimes it would be stronger than what a deep wave could produce or lighter than what would be made by mass wave collision.

Like the best parts of science, it turns out the answer was pretty simple: it's both.

A paper called " How ocean waves rock the Earth: Two mechanisms explain microseisms with periods 3 to 300 s" published in February's edition of Geophysical Research Letters, a journal of the American Geophysical Union. In it, French scientists from the Centre National de la Recherche Scientifique hypothesize that it's actually both wave based phenomena working together, but it's definitely the waves.

Knowing the cause of The Hum hasn't yet helped people who are suffering the physical side effects of being super-people (seriously, we're not supposed to be able to hear this thing), but at least one thing is now very clear: they were not crazy.

The Earth hums because the oceans.

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Mystery of why the Earth hums solved - Geek.com

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In 1998, scientists discovered that the planet is constantly making a sound. This was vindicating news for a very small minority of people throughout the world who were obsessed with a low hum that seemingly only they could hear. The phenomena of Earth's constant but quiet vibration is called simply "The Hum" for sufferers and conspiracy theorists.

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In this video these resident os taos giving thier opinion and problems about the Taos Hum. One of the Lady said that she lost her job because of this phenomena.Some said it is due to metal problem.Some beleive that it is like an motor running far, refrigretor running,diseal motor truck ideling far off and someone is scracting nail on the board.Those people who can hear this are suffering from it, some suffer everyday.They do not even know about the source where it come from. Some can hear this miles away.People aslo believe that it is a communication way of american military. University of New mexico try to detect the problem they made some instrument to measure it and get to known about the formation of irritating noise.Recently a news said by the Underwater divers in california hera this voice more strongly underwater which is vibrating their lungs.

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This pictture made from the the country chile which are describing about what happen to human because of the taos hum. It is a phobia like fear of something that can be harm someone .Like the resident of taos have some phobia about it because some of them lose their jobs and one try to suicide because due to irritation of that low frequency nooise. It desribing the side effects of noise to the humans that is not good.

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Haunting Hymns of Taos Hum
Taos hum is that irritataing low frequency noise that is not heard by all the people who lives in taos,Taos hum is heard by the 2% of the population. People becomes very irritate because of hearing this. It was very bad news that because of that people do suicide some people getting too much irritates so they left the area. In this video some believe that is  a message from the long lasting spirit from other side tryng to speak with us,It become as Haunting place.

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In this picture is wrritten that "There is no known source of sound". describing that nobody knows about the source of his low frequency noise. University of new mexico try to find it so they make instrument so they can find where the formation of taos hum start from. But nobody knows yet. Some beleive as we discuss earlier that its like an idling truck far away or scratching nail on board or the military communication that takes place this sound fomation.