Infra-sound from Wind Turbines much much worse than audible noise!!!……… scientific study!!!!

Posted: August 23, 2012 in Uncategorized

What you can’t hear may be worse, much much worse than what you can hear according to a Ph.D in Cochlear research.

Wind Developers, politicians and so-called Pro-wind Medical experts  will tell you that if  Wind Turbines meet the “Governments guidelines” of 45 Db and lower, they are not causing any more harm than being merely an annoyance to some and mostly benign to others.

Many thousands of people world-wide have suffered massive health  issues being within the vicinity of a Wind Turbine yet when they ask for help from Medical authorities or the very politicians who have forced these monsters onto the communities of the world all say in unison: “it’s all in your head”!

Damn right it is! Only Infra-sound produced by these useless machines is the sound you can’t hear and cannot be recorded by video cameras or recording machines…..only by instruments that don’t use the “A-weighted scale”.

I’m sure nobody from the Ministry of Environment wants to use that type of machine or their whole misdirected agenda to legitimize these disgusting things would fold like a cheap blanket!

So there you have it. A Government who is intentionally trying to cover up a very real and dangerous hazard caused directly by their actions that should fall squarely on their shoulders and be held responsible to be charged legally for doing harm to people.!

No wonder they don’t want to talk about Health issues. Oh, and our Chief Medical Officer Arlene King should be also held responsible for this massive cover-up. Maybe her turn will come when she is forced to testify later this year in a court case which she is trying desperately to avoid!

Wind Turbines can be Hazardous to Human Health

Alec N. Salt, Ph.D., Cochlear Fluids Research Laboratory, Washington University in St. Louis.

Updated 8/15/2012 To keep this as readable as possible I have not included reference citations. They are typically available in our publications.

Large wind turbines generate very low frequency sounds and infrasound (below 20 Hz) when the wind driving them is turbulent. The amount of infrasound depends on many factors, including the turbine manufacturer, wind speed, power output, local topography, and the presence of nearby turbines (increasing when the wake from one turbine enters the blades of another). The infrasound cannot be heard and is unrelated to the loudness of the sound that you hear. Infrasound can only be measured with a sound level meter capable of detecting it (and not using the A-weighted scale). Video cameras and other recording devices are not sensitive to infrasound and do not reproduce it.

You cannot hear the infrasound at the levels generated by wind turbines, but your ears are indeed detecting and responding to it. The picture shows the enormous electrical potentials that infrasounds generate in the ear. The potentials (18.7 mV pk/pk amplitude in this case) are about 4 times the amplitude of any sounds that are heard. This shows the low frequency part of the ear is extremely sensitive to infrasound. Infrasound generates larger electrical responses than any other type of sound, including sounds you can hear presented at the loudest levels.

The ear is most sensitive to infrasound when other, audible sounds are at low levels or absent. That is why homes and pillowscontribute to the problem. To clarify, maximum stimulation of the ear with infrasound will occur inside your home, because the audible sound of the turbines is blocked by the walls of the house, but infrasound readily passes through any tiny openings. Similarly, sleeping with one ear on a pillow will block audible sound to that ear but will not block the infrasound. In either case, the infrasound will be strongly stimulating the ear even though you will not be able to hear it. The presence of sounds at higher frequencies, in the 150 Hz – 1500 Hz range at levels above 60 dB SPL, suppresses the ear’s response to infrasound. It may be possible to mask the influence of infrasound with other noises but the frequency properties of the masking noise must be carefully considered. Frequencies above about 1500 Hz will not do anything to help. So before you use a fan or noise masker provided by the turbine company, be sure the noise has the necessary characteristics.

 

We know that the ear is being stimulated by this sound, but why would that matter if you cannot hear it?

 

There are several ways that infrasound could affect you even though you cannot hear it. They are:

  1. Causing Amplitude Modulation (pulsation) of heard sounds.
    We know that infrasound affects the sensory cells of the ear in a way that changes their sensitivity (like turning the volume control of the stereo up and down repeatedly). This is a biological form of amplitude modulation that cannot be measured with a sound level meter. The people who are measuring amplitude modulation of heard sounds with sound meters are looking at something completely different. Biological amplitude modulation can be much more powerful, with the volume cycling from going from “off” to “full”, rather than just changing a few dB. So, to investigate amplitude modulation without considering the infrasound-induced component is never going to explain the true nature of the problem.
    Symptoms: Pulsation, annoyance, stress

  2. Stimulating “subconscious” pathways. 
    We know that activity in many nerves of the ear does not result in “hearing”. If the nerves from the utricle or semi-circular canals are stimulated, you may get eye movements and changes in tension of neck muscles, but you don’t hear it. The pathway of conscious hearing is very well established. It goes from the inner hair cells of the cochlea, through type I auditory nerve fibers, to the fusiform cells of the cochlear nucleus in the brain, and so on. This pathway has been well-studied. The outer hair cells of the ear (the ones that are sensitive to infrasound) do not connect to this conscious pathway. They connect to the type II nerves (which make up 5% of the nerve fibers), then to granule cells in the brain, then to cartwheel cells and to a host of other pathways in the brain. The cartwheel cells are known to be inhibitory to hearing which may explain why the stimulation is not heard. It is known that granule cells are connected into circuits related to attention and alerting. It is not unreasonable to think that stimulation of this pathway could wake you up, and you wouldn’t even hear what had actually woken you.
    Symptoms: Sleep disturbance, panic, with chronic sleep deprivation leading to blood pressure elevation, memory dysfunction and more.

    READ MORE HERE:

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