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THE SCIENCE OF THE
For Hum Science and much more.
Pic below show some Hum locations
What is the
The Hum is highly geo-sporadic and is also temporal sporadic
It is an
anomalous sound heard or ‘perceived’
by an estimated 2-11% of the population mainly at
night, mainly indoors and in mainly industrialised countries, although
a similar thing has been heard due to volcanic action in Hawaii. Hearing
maximises in the 50-60 yr old age groups but the author is aware of people as young as 24
and as old as 78 who presently hear the
2. What does the
Any description of a perceived sound or noise has, by definition, to be purely subjective. Those who hear it describe it as like a throbbing diesel engine or a distant fly, bee or wasp trapped in a bottle. Sometimes the sound is perceived as though it is just behind one ear. Sometimes physical vibrations can be perceived as well, particularly if lying in bed. Sometimes the pattern heard is more complex and may sound almost like music, Morse code or digital code. Sometimes the patterns speed up and slow down other times they are constant. Sometimes the noise sounds more ‘digital’ like ‘phuts’ of pressure almost punching the ear drums with a very fast rise time.
3. What causes
In summary it is believed to be either an infrasonic phenomenon (a type of LFN) or more rarely in some individuals a magneto –acoustic or gravito –acoustic (seismic) phenomenon. Infrasound can modulate other low frequency sound either in the ear (see Moller and Pederson 2004) or at the vibrating walls or floor of a building ( Dr Barnes private research), people with good low frequency hearing become aware of this in a quiet environment, sometimes referred to as a highly skewed acoustic spectrum (absolute quiet above about 200 Hz) ( see Vasudevan and Gordon) http://books.google.co.uk/books?id=b3Xqfc2KRo8C&pg=PA27&dq=Vasudevan+and+Gordon++Southampton&hl=en&sa=X&ei=SI59UYrLHMHBPJvVgLgB&ved=0CDYQ6AEwAA#v=onepage&q=Vasudevan%20and%20Gordon%20%20Southampton&f=false.
4. What is the source of the Hum
The latest conclusion of the present author is that the Hum is associated with renewable energy systems, especially although not exclusively wind energy. This does not mean to say that historic Hums or absolutely al Hums have this origin.
At least for the Hum in North Wales and that reported on Forums in many places round the World, the Hum seems to show properties of being both natural and anthropogenic. This is not a conflict if the Hum is comprised of two or more signals which may or may not come from the same source but satisfy (3) above. Neither is it a conflict because natural processes control the flow of both natural and anthropogenic sound through the air or seismic signals through the ground.
Thus the Hum could potentially involve modulation together of natural earth sounds, signals and fields with anthropogenic (person made sounds or signal fields) or in that it is intensity modulated or has occurrence times which are due to the propagation routes of the anthropogenic component(s) also depending on natural geo-physics and /or space physics processes.
author’s presently held Scientific opinion is that in its simplest form the
Wind farm emissions are known to irreversibly sensitise and alter ear physiology but sensitization of the ear to the Hum may only possibly include radio signals of various frequencies, Magnetic# and Electromagnetic fields may also feature but these are NOT usually the direct cause of the Hum but are merely catalysts for it. Coincidently the Electricity grid could also be modulating the local gravitational field giving rise to infrasound. Deaf people may hear the Hum through bio-magnetic or bio-gravitational detection. World electricity grids at 50 and 60 Hz may even interact in space to give a form of the Hum!!
* A classic proven case of this was at Kokomo where separate sources of 10 and 30 Hz were traced. The laws of physics mean these would only produce the Hum at certain locations.
# If you want to know if you are magnetically sensitive, try standing underneath high voltage pylons with your fingers poked firmly in your ears to cut off all external sound and see what happens, there should be a direction effect if you are . Also you are more likely to hear the Hum in a parked car while the interior light is dimming if you are magnetic sensitive.
4. How come I just started hearing the
It could be
your age. The author’s
hypothesis is that as our high frequency hearing sensitivity starts to fall off
with age our low frequency sensitivity boosts up to compensate for it . It
could be you just moved house to a location which has the right frequency
components for the
It could be a new wind farm,
factory, industry or power plant has opened up added a frequency component needed for the
5. Why do I only
At night it
is generally quiet there is less masking noise. There is less vehicular
movement to ‘stir up’ the
6. Why do I
only hear the
Your house acts like a giant acoustic sounding box. Double glazing and cavity walls actually make matters worse! Cavity walls may conduct ground borne vibrations such as those from idling trains in sidings and radiate them as infrasound and sound. Double glazing blocks off high frequency sounds but is next to useless with low frequencies below 150Hz. Chimneys and drain pipes may also enhance the Hum by a process known as Helmholtz Resonance ( rather like blowing over a bottle neck). The floor and walls also act as converters which convert seismic vibration into acoustic sound.
Piezo -electricity in brick can also radiate 100/120 Hz mains hum as a very weak acoustic sound.
7. Why don’t ear plugs work very well?
Ear plugs offer very little attenuation at infrasonic and low sound frequencies. However, wax offers far more attenuation than foam at low frequency.
Natural masking noises the wind and waves or recordings thereof are much better. Also in some cases you might find a combination of ear plug and radio frequency screening material even better.
8. Why does the
The weather effects
the way sound and infrasound moves through the atmosphere. If any of your
9. We had two
feet of lying snow and the
This is a
more difficult one. Either your
Do some geographies/geologies favour the
In coastal regions infrasound can also be generated naturally e.g. booming sand dunes but also from oil drilling, seismic exploration, super-tankers and wind farms. There is often more railway (rail-road) activity too. Idling diesel engines in sidings are a potential LFN problem in the UK.
12. I still hear the
These are only good down to about 150 Hz. The frequency group which causes the HUM is much lower than this.
13. I stopped hearing the
It sounds like one of your
I hear the
don’t say whether there are street lights. This is a very hard question
to answer anyhow but could be due to synthesesia ( the brain handling duelled sensory
input). If your
the other hand you are looking at street lights there may be modulation of the
light intensity by ground vibration or mains voltage/frequency fluctuation. If the
15. I hear the
This might be due to more atmospheric speckle as in the answer above or it could be due to the effect on tide and tilt altering your local seismic propagation. (The way ground vibrations move is altered by the moon)
Also infrasound propagation in the Hum seems to depend on planetary cycles suggesting it is formed by a complex interplay of natural and anthropogenic (people made) processes. For instance wind farms produce OAM under certain wind conditions which may eventually be proven to be linked with planetary cycles.
Surface seismic waves ‘propagate’ or move
through the earth differently according to how much stress is in the earth’s
crust. Their harmonic content is also different. Waves from hydro-power
plants are susceptible to this and travel hundreds or even thousands of
17. I still hear the Hum in some caves?
These will be more likely caves containing piezo-electric or magnetic material (rocks or minerals).
The Hum you hear may well be anthropogenic modulations of the earth’s super weak magnetic field.
If you are magnetic sensitive, external magnetic material will act as a kind of inductive matching system
between your bio- magnetite and the World outside.
18. Can I get relief from the HUM?
could move house but this sadly this drastic measure doesn’t always work. You
could emigrate but as more of the World becomes industrialised particularly
using renewable energy systems there are fewer and fewer
LAST UPDATED NOVEMBER 25TH 2016.