WIND TURBINE NOISE
Signthis petition to the PM for a minimum 2km buffer zone between an industrial sized turbine and the nearest dwelling.
See you-tube videos about wind turbine noise :
from close-by 
comments of residents
various comments quoted from medical forms
Horrendous one on shadow flicker (don't miss second half)
Then read our chairman's recent (April & May 07) open letters to Force 9 about excessive turbine noise below:
Number of tenanted properties may suffer excessive turbine noise
SIR,
— The guide-line standard used to evaluate noise levels from wind power
stations in the UK is The Assessment and Rating of Noise from Wind
Farms ETSU-R-97. This document recommends that the levels of acceptable
day- and night-time noise can be increased for those who have a
financial involvement in a wind power station development. In other
words, those who derive income from wind turbines, such as the owners
of the land on which turbines are erected, can accept higher noise
levels because this noise is generated from an income source.
House
owners and tenants who do not gain from such a financial involvement
are subject to much stricter constraints on the noise generated from
wind turbines.
In the Environmental Statement for the proposed wind
power station at Barmoor, it is stated that the acceptable limits for
wind turbine operational noise are clearly defined in the ETSU-R-97
document and that these limits should not be breached. However, an
independent review commissioned by SOUL (and submitted to Berwick
Borough Council) suggests that the predicted noise level at a number of
tenanted properties would exceed the allowed limits.
Tenants of farm
cottages seek the good-will of their landlord and could feel
constrained to suppress misgivings about a development if their
landlord were to benefit financially from a wind power station
development. However, such tenants are not supposed to be subject to
less stringent noise limits than the rest of the population.
It has
been suggested that some developers in other parts of the UK have
resorted to paying money directly to such tenants so that they appear
to become subject to the higher potential noise limits, as a result of
artificially moving into the category of having a ”financial
involvement in the wind farm”. However, such tenants do not really have
a “financial involvement” as this requires money or assets to be
invested in the project in anticipation of a return. Any developer
paying money directly to tenants would be acting against the intention
of the noise guidelines, which are directed at those who receive rent
for the use of their land for a wind power station.
Can
Force Nine Energy and Catamount Energy confirm that they have not paid
nor are planning to pay any money to tenants, living close to the
proposed Barmoor wind power station, in order to ‘buy’ their
acquiescence in accepting higher noise levels than those deemed
acceptable for other residents of the area? If they were attempting to
make such payments, it would surely constitute a dubious and
unacceptable practice; and the Barmoor proposal would still appear to
be in violation of the current UK wind turbine noise limits.
PETER H WORLOCK,
Chairman,
SOUL SteeringGroup.
SIR,
— In the Berwick Advertiser of April 19 2007, you kindly published an
open letter from SOUL to Force 9 Energy and Catamount Energy (the
developers of the proposed wind power station at Barmoor). In that
letter, SOUL asked Force 9 and Catamount to:
“confirm that they have not paid nor are planning to pay any money to
tenants, living close to the proposed Barmoor wind power station, in
order to ‘buy’ their acquiescence in accepting higher noise levels than
those deemed acceptable for other residents of the area?”
SOUL has had no direct response to that question – either publicly or
privately. There has been no response from either of these two
companies in the Berwick Advertiser. This seems strange, considering
how quick Force 9 have been to respond to other letters in this paper
since their planning application was lodged.
What are we to infer from this silence? Surely, if neither company had
made such payments nor were planning to make such payments then they
would be keen to confirm this, answer the question we have asked and
put paid to any lingering concern.
Does this silence mean that we all have to work on the basis that such
payments have been made or will be made at some point? If this is the
case, it would surely constitute a dubious and unacceptable practice.
After all, if any of us were to apply for planning permission to extend
our home or build a house and were then to offer our neighbours cash
not to object, we would be (quite rightly) pilloried in our
communities, criticised by the press and might be accused of bribery
and corruption.
SOUL believes that it is in the public interest that this question be
answered by Force 9 Energy and Catamount Energy. Therefore, we ask
again publicly for a response to the question:
“Can Force 9 Energy and Catamount Energy confirm that they have not
paid nor are planning to pay any money to tenants, living close to the
proposed Barmoor wind power station, in order to ‘buy’ their
acquiescence in accepting higher noise levels than those deemed
acceptable for other residents of the area?”
Continued silence on this issue from these two companies means that we will all have to draw the obvious conclusion.
PETER H WORLOCK, Chairman, SOUL Steering Group.
NOISE A recent independent UK study* into the impact on health of noise from wind turbines concludes that they can have an adverse impact on the quality of life and/or the health of families living nearby. Many families are experiencing genuine distress as a result of the noise from commercial wind turbines, and some have been forced to leave.their.homes. The report recommends a mandatory minimum buffer of 2 km between the nearest home and a 2MW turbine, and a bigger buffer for turbines over 2MW capacity. At Barmoor there would be 160 homes less than 2 kms from the proposed turbines. However, the Barmoor turbines would have an installed capacity of 3MW and there would be 300 homes separated from them by less than 2.5 kms.
Radio 4’s ‘You and Yours’ programme on Tuesday 13 March featured one such family whose lives had been“completely ruined” by the noise from a nearby giant wind turbine. The programme also referred to a report commissioned by the UK Noise Association (UKNA) which reinforces the findings of the report we cite above. The UKNA has called for a complete moratorium on new turbine developments until the effects of turbine noise can be fully assessed.
Wind turbines 'are ruining our quality of life'
By Martin Beckford, The Telegraph, 16/04/2007
The
majority of people living near wind turbines believe that the noise
they make is ruining their health and quality of life, a report has
revealed.
Neighbours also claim that the constant hum and the
loud "whooshing" sound made by the blades in high winds is destroying
the value of their homes.
A survey of people whose homes are
situated within 1.2 miles of turbines has shown that three-quarters of
them feel that the noise has damaged their quality of life while four
out of five say it has affected their health.
Those who said they
were made ill by the sound of the wind farms, which are designed to
benefit the environment, described conditions ranging from migraines
and palpitations to depression.
Three quarters said their sleep
was disturbed by the noise and some claimed that they had been forced
to stay in bed and breakfasts to get a proper night's rest or to sell
their homes at reduced prices to get away from the area.
One of
the respondents to the survey, carried out by a family doctor, claimed
that the noise was "like Chinese water torture", while others said they
could "see no future" and "dare not sleep at home".
Dr Amanda Harry, a Plymouth GP who compiled the report after studying
the
effects of wind turbine noise for several years, wrote: "What this
shows is that there are a number of people suffering from the
consequences of noise from the wind turbines.
"I'm sure that the cases mentioned here are the tip of the iceberg and further independent investigation is warranted.
There
is much concern within communities that if one is seen to complain
about the noise and if they decide to move away, their properties will
be difficult to sell and possibly devalued as a result. They feel they
are in a 'Catch-22' situation."
Some wind farms are situated just
a few hundred yards from homes but Dr Harry believes that until
independent research is carried out, no turbines should be built closer
than 1.5 miles from the nearest dwelling.
Dr Harry wrote: "There
are many people living near wind turbines who are suffering from
problems with their health. The noise produced from the wind turbines
is an extremely complex one and I feel that it is the complexity of the
noise and vibration which causes the disturbance.
"From my
discussions with people suffering from ill-health who live near wind
farms, it seems that the symptoms suffered can occur up to a mile from
the wind farm."
But a spokesman for the British Wind Energy
Association said it was just a "myth" that turbines were noisy. She
said: "We are aware that people have concerns but we are not aware of
any evidence that supports their claims.
"The unfortunate thing about noise is that it can be a subjective perception. Some people can be more sensitive than others."
The
Government commissioned a report into claims that the low-frequency
noise emitted by wind turbine generators was affecting people's health
but it found last year that there was "no evidence" of ill-effects.
The
report did admit that some wind turbines were responsible for a loud
"whooshing" noise created by a phenomenon known as aerodynamic
modulation, but the Department for Trade and Industry insisted that
this was present in only five of the 126 wind farms in the UK.
A Government working group on wind turbine noise has also been set up.
From Jane Davis - letter to Berwick Advertiser
My name is Jane Davis and I live 930 m from Deeping st Nicholas Wind farm just south of Spalding in South Lincolnshire.
There are 6 other houses a similar distance away from the turbines but ours is the only one downwind of the prevailing wind and our nearest neighbours are ¼ to ½ mile away.
The wind farm was built last summer and became operational in early June – within 3 days we started having problems with the noise and hum emanating from the windfarm.
We did not object to the windfarm in the planning stage as we did not believe that there would be any issues for us, and we believed that wind power was a good way of meeting the energy gap. We did read some negative reports on the internet but could not believe there would be any issues for us as we were never specifically consulted, nor were any background noise readings taken at our house.
Since last June we have had constant issues with loud noises and low frequency sounds that create a hum in the house all the time. We have kept a log throughout. Many times last summer as we are downwind of the prevailing wind we were woken by loud “WHOOSHING” noises, that stopped us sleeping for more than 4 hours a night. We informed our local environmental health department in June and they came out and were astonished at the loud noise recordings that they made.
Due to the government’s preferred measure for assessing the noise from wind turbines known as ETSU-R-97, which averages noise peaks out over a period of time there is no recourse to justice under existing British law to assist us. We now know that although we were initially told less than 5% of wind farms have this problem the reality is likely to be in excess of 10% and research has been undertaken by the DTI & DEFRA which will be reported soon that will give further and better information on this. We hope that other research will follow. We have found the DTI & DEFRA and the wind farm operators to be supportive so far – but there isn’t anything that anyone can do…..as
We now know that we suffer from a phenomenon known as aerodynamic or amplitude modulation. We also know that “in general, turbines are noisier now than in 1993”. ( Hayes McKenzie Partnership – Acoustic Experts in a report for Angus Council, Forfar, Scotland. June 2004). This seems to support the fact that the government found it necessary to set a specific measurement for wind turbine noise, and that there is a Noise Working Group that operates between DTI & DEFRA.
Aerodynamic modulation is not fully understood, Dr McKenzie from the Hayes McKenzie partnership in the closing statements in April 2007 for South Cambridgeshire District Council explained that:
"Aerodynamic modulation exists, but there is no clear understanding as to what causes it."
1. It causes sleep disruption.
2. It is not covered by ETSU.3
3. This site (Deeping St Nicholas) is a likely candidate.
4. There is a need to assess and potentially apply a correction to ETSU.
We do know and accept that not every wind farm creates noise issues but those that do make life impossible for those who live near them – and by near I mean less that 2km or 1.5 miles.A
s a result of our difficulties we have been forced to find an alternative place to sleep – our sleeping house – which is 5 miles away in Spalding itself. After spending many nights “sofa-surfing” we reached the conclusion in December that we had to do this in order to be able to work and live safely – with a normal amount of sleep.
Because of our experiences we have been asked to many meetings across England and now Scotland by those areas where wind farm development is proposed. Most recently we have been to Sibsey and Monthreathmont in Angus.
What we find astounding is that wind farm developers and land owners will often attend these meetings with literature that can really only be presented as including Terminological inexactitudes such as:
• “Modern wind farms are generally quiet”
• “property Values are not affected” (Our house which would previously have been worth about £180,000K is now likely to have a value of just the land –35K to 50K ..and would not be marketable as a home for people to live in any longer. And finally
• “I can categorically state that there is no significant infrasound from modern turbines.”I
If the latter is true why do we have a report from Hayes McKenzie themselves that acknowledges that we do have low frequency here and this is also backed up by the fact that we are mole free?
One of our local lanhttps://websitebuilder.1and1.co.uk/xml/wfxdirect/preview;jsessionid=57C97E1A79905490CE01201283CCE0FD.TC110ad owners – who has some of our offending turbines on his land is now showing coach loads of people from other areas around “his” windfarm and reassures them that there is no noise from his turbines. He does not seem to see that there is anything wrong with that, but then I suppose given the income he is going to have annually over the next 25 years – he would say that wouldn’t he…
More Noise.
The noise from a wind turbine comes from both the mechanical gearing and
from aerodynamic properties of the rotating blades. The former can to a degree
be controlled and insulated and some makes of turbine are quieter than others.
The more intrusive noise comes from the effects of the blades (the blades
proposed at Barmoor are 45m, confirmed in a letter from Force 9 Energy) moving
through the air and the industry has had virtually no success in stopping this.
The larger the turbine, the greater the air mass moving the blades and the
higher the noise level.
The noise is a penetrating, low -frequency "thump" each
time a blade passes the turbine tower.
The genuine difficulty that developers face is that noise levels cannot be predicted in advance. The Energy Technology Support Unit has reported "at present there is no established method for the prediction of wind turbine noise and basic understanding of wind turbine noise is low. Not enough is known of the basic mechanisms which control the noise radiation process to allow the development of detailed prediction methods." It must also be remembered that noise is recognised as a cause of stress and stress-related illness in modern society.
In the "Journal of Sound and Vibration",
277 (2004), 955-970, G.P. Van den Berg, a physicist at the University
Groningen in the Netherlands, believes he has found the answer to why
modern on-shore wind turbines can cause noise problems for residents at
distances of a mile or more. Sound measurements were made around a wind
farm of 17 turbines on the Dutch/German border. The residents living
at 500m and more and some residents up to 1.9Km distance expressed
annoyance particularly at night. Van den Berg discovered that wind
turbine developers in the UK and elsewhere had made noise predictions
at wind speeds measured at a height of 10m. However, wind speeds at
typical hub heights of 60m and above (Barmoor hub heights are 65m) show
that the wind speeds are up to 2.6 times higher than expected at night.
During the day the actual background noises are not good at covering the rhythmical thumping caused by the blade passing the tower. Consequently against expectations the turbines were turning at night and the noise propogating down into an area at ground level where there was no background noise to mask it and consequently residents were experiencing sound levels 15dB higher than expected. Although the turbines were making as much noise as normal, it was carrying much farther, and especially at night when it was particularly troublesome. Fascinatingly, Van den Berg has found that the error is smallest within 400m of the turbine but is much greater at distances up to 1.6Km away.
See news page (Jan 12th 07) "Wind farm noise driving us out"
Le Monde Thurs March 30th
French Academy of Medicine calls for
immediate halt to construction of wind turbines of over 2.5 MW situated
within 1.5 km of habitation (Barmoor, Middlemoor and Moorsyde's are 3MW)
Does the noise from wind turbines threaten the health of
residents? This question, while perhaps surprising, is often
raised by associations opposed to the installation of wind turbines over more
than 100metres in height. Following a request by
the ACAS, the Association for the protection of River mouths (Finistere) in March 2005
the Academy of Medicine agreed to investigate the issue. Its report, published the 23rd of March 2006 should
lead the anti-wind lobbies to reconsider their position. The
survey carried out by Claude-Henri Chouard states that harmful sound effects
produced by the wind turbines exist but it also shows that, due to a lack of precise studies, the result is either exaggeration or rejection of this phenomenon.
These machines certainly produce a considerable noise, caused by the rotation of the gears in the machinery, and the wind striking the blades and mast of the turbine. But the noise is not consistent. It can vary greatly depending on the climatic conditions and above all, the topography of the sites. At St Crépin (Charente Maritime) for example, recordings were made at 9 different sites. At 6 of them, noise levels were within authorised limits, but 3 were not.
The report deplored the lack of studies on sound near turbines. After all, it was not until October 2005 in Berlin on the initiative of a European association of acousticians (INCE Europe) that the first scientific conference on noise from wind turbines took place.
On the other hand, the effect of noise on health – or “Chronic noise trauma” has been recognised for years “At moderate intensity, the experts assert, the noise can induce reactions of stress, disturbed sleep and effect the general state of health. (…) Sleep is disturbed if the ambient noise level exceeds 45 decibels, but the limit is only 35 db for the World Health Organisation”
The best way of preventing this risk is to distance homes
from the source of the noise, but a simple rule cannot be applied, because “
the propagation of sound depends on
environmental and topographical elements unique to each site”. Whilst waiting
for epidemiological studies, the Academy
of Medicine thus recommends
“As a precaution, construction of wind turbines of over 2.5 MW situated
within 1.5 km should be suspended immediately”.
Hervé Kempf
For the full report (in French) click here
Infrasound
Infrasound is the sound that is carried through the earth from the site of
the turbine. Van den Berg believes that infrasound is very probably a
significant feature in the audible noise problem. He has pointed out that
although inaudible, the low blade passing the tower frequency modulates clearly
audible higher frequency sounds and thus creates periodic sound (with the effect
strengthened at night). He further observes that groups of several turbines can
interact to amplify this effect.
Many developers are currently proposing putting substantial groups of large
turbines within 500m of residential areas. Experiences across Europe suggest
that there are problems with turbine noise, and Van den Berg's recent work
offers some possible explanations.
|
Monday, 20th September 2004 NEW RESEARCH EXPLAINS WIND TURBINE NOISE PROBLEM In
a major new article published this month in the Journal of Sound
and Vibration (1), G. P. Van den Berg, a physicist at the University
of Groningen in the Netherlands (2), believes that he has at last
explained the mystery of why modern onshore wind turbines can cause
noise problems for residents at distances of a mile or more. (1)
www.elsevier.com/locate/jsvi For further information on the Renewable Energy Foundation (REF), please contact Margareta Stanley at DBA on 020 7930 8033 or visit www.ref.org.uk or e-mail info@nchl.demon.co.uk |

