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Tag: Are wind farms bad for the environment

do wind farms make noise

do wind farms make noise插图


What does a wind farm sound like?

What does a wind farm sound like? Apex projects adhere to all local, state, and federal safety regulations to protect the health and welfare of workers and the community. This includes regulations pertaining to sound. As wind turbine blades pass through the air, they make a sound that is often described as a “whoosh.”.

Are wind farms noisy or quiet?

Transport secretary Grant Shapps has branded new on-shore wind turbines as an ‘eyesore’ as he fights against the expansion of renewable technology. “They sit on the hills and can create something of an eyesore for communities ,” he told Sky, exposing the government divide, adding there are “problems of noise as well”.

Are wind farms bad for the environment?

Windfarms may raise local temperatures and there are bound to be environmental effects due to increased temperatures close to windfarms as well as the reduction of air speeds downstream. However, the heat released by a windfarm is likely to have a minimal effect on global temperatures because wind energy is converted to heat eventually, regardless.

Are wind farms noisy?

However, wind turbines do produce some sound, which means wind farms should be sited with this in mind. Some small turbines, smaller than 40kW, can get noisy in strong winds. There are many different brands of small turbines, and the sounds from each and the conditions that cause the sounds vary.

How loud is wind turbine noise?

Perhaps the most important measurement of wind turbine noise is if it is more than 5dB louder than any background or surrounding ambient noise. If a wind turbine starts to bypass the 5dB level of loudness over surrounding ambient noises it will start to become noticeable.

What noises can wind turbines make?

Depending on the surroundings of the wind turbine, often times other noises like nearby traffic, ocean waves , or other natural ambient noises will mask any noise produced by the wind turbine.

How does wind make noise?

The aerodynamic noise is generated from the blades as they pass through the air. The loudness of the aerodynamic noise is related to how fast the tip of the blades are spinning, the size of the blades, and the wind speed. The greater the wind speed, the faster the blades spin, and the louder the aerodynamic noise will sound. The aerodynamic noise of a wind turbine is usually described as a whooshing, buzzing, or pulsating sound.

What is the sound of a wind turbine?

The aerodynamic noise of a wind turbine is usually described as a whooshing, buzzing, or pulsating sound .

What is the noise of a spinning blade?

The “whooshing” noise, which is usually easier to hear at night due to lower ambient noise levels, is a pulsating noise that occurs simultan eously with the spinning of the blades. The faster the blades are spinning, the more frequent the pulse of the sound becomes.

How does wind noise come from?

Mechanical wind turbine noise is generated from the inner working components and rotating gears of a wind turbine. More expensive, utility size wind turbines are usually very well insulated to prevent any mechanical noise from leaving the nacelle or wind tower. Smaller, more economy size wind turbines may be less insulated which will sometimes result in more noticeable mechanical noise outside of the wind turbine.

Is wind noise subjective?

The amount of potential noise disturbance of a wind turbine is subjective, with a huge factor being the decibel level of nearby ambient noise. The amount of irritation caused by wind turbine noise is decided by the beholder. There also, however, may be an incalculable disturbance from the “whooshing” sound, or the low-frequency infrasound noise levels produced by a wind turbine that can cause psychological stress.

What is the noise from wind turbines?

“There is the mechanical noise from the turbine’s nacelle caused by the gearbox and generator, and there is the aerodynamic noise from the wind turbine’s blade,” he explained. “The dominant of these two sources is the blade, mainly during the blade’s downwards stroke during a rotation,” he said.

Do wind turbines make noise?

And so, in short, it seems that yes wind turbines make noise — some of which has been eliminated with modern turbine designs — and, no, this noise does not impact human health. But that noise does exist, even if it is at a very similar level to general background noise even in rural areas, and therefore all those involved in a wind farm project cannot ignore it.

Is wind turbine noise scientific?

While wind turbine noise from the outset might seem like something scientific that can be measured categorically it is a highly complex process once ‘in the field’. “Measuring noise is very frustrating, especially in residential areas where background noise is very similar,” Andy Mckenzie, from Hayes Mckenzie Partnership, said.

Is a wind turbine bigger than a 747?

As blade lengths have increased over the years — a wind turbine rotor is now bigger than the wingspan of a Boeing 747 and turbines have grown from 200 kw power ratings up to 7.5 MW — then the potential for greater noise levels goes up too. However, since the earlier days of modern wind power, turbine blades designs have improved drastically.

Is wind noise bad for health?

In January 2012 a study for the Massachusetts Department of Public Health said: “there is insufficient evidence that noise from wind turbines is directly…causing health problems or disease.” For more studies, search for “health” on the EWEA blog.

Is wind energy safe?

This is despite the fact that the balance of scientific evidence clearly shows that wind turbines do not adversely affect human health, and in fact, wind energy is broadly recognised to be one of the safest forms of electricity generation available today .”

Is it possible to measure everywhere?

What is more, it is impossible to measure everywhere. Places like people’s back gardens — and if we’re talking about noise affecting public opinion this is surely a key place to measure — are usually off limits. And there is the effect of the wind direction over the noise survey period — are the measurement instruments downwind from the wind farm? — he added.

What are the drawbacks of adaptive noise control?

The major drawback to this adaptive noise control method is the corresponding reduction of power output since the angle of attack is decreased. Despite the loss in power, the main advantage of wind turbines with optimized operating conditions is that the acoustically affected areas are much smaller, allowing more wind turbines to be built in a wind park.

What is the role of pitch angle in wind turbines?

The pitch angle of the wind turbine blades also has an important role in noise production. An increase in pitch angle will lead to a reduction in the angle of attack. If the pitch angle is reduced, a thinner boundary layer results on the suction side, which is considered the strongest source of noise production.

How much noise does a wind turbine make?

A wind turbine produces approximately 100 dB of noise, and it drastically decreases as the distance increases. 250 meters away from the turbine, the noise is at 50 dB, but from 2 kilometers away it’s only about 20 dB. Depending on which way the wind is blowing, this noise rate can decrease by 10 dB.

How does noise pollution affect people?

One important side effect is noise pollution, as it could affect residents of nearby cities. Noise pollution can cause physiological and psychological problems. In an office environment, for example, it can negatively affect productivity, concentration and can also increase stress.

What is noise pollution?

Noise pollution is any sound or noise that is louder than the usual background noise you hear. In case of wind turbines, it has two different kinds: mechanical and aerodynamical. Mechanical noise is created by the friction between two components of the machinery, and vibrations induced by the rotating components.

How to reduce aerodynamic noise?

There are several adaptive noise reduction approaches for aerodynamic noise, including varying the speed of rotation of the blades. Since an increase in rotational speed will also lead to increased noise production, lowering the rotational speed will lead to decreased sound.

Where does infrasound come from?

It comes from the motion of the air around the blades. It’s proportional to the speed of the blades. Wind turbine parks were also found to create infrasound. Infrasound or low-frequency sound is noise below the lower limit of audibility.

What are the limitations of turbine noise?

This means that when individuals self-reported that their sleep was disturbed by turbine noise, the researchers calculated the noise level at the time of the disturbance and made a judgement whether turbine noise, or just general annoyance, was to blame.

What is prediction noise model?

Prediction noise models under-predict the loudest turbine noise levels heard by neighbors at the point when their sleep is interrupted. This is a significant factor that cannot be dismissed.

Where did Steven Cooper work?

Steven Cooper’s work at the Cape Bridgewater wind facility in Australia found six individuals were able to “sense attributes of the wind turbine emissions without there being an audible or visual stimulus present.” More specifically, Cooper found that inaudible turbine sound emissions disturbed his study subjects even when they could not hear the turbines or see them moving. The “adverse reactions to the operations of the wind turbine (s) correlate [d] directly with the power output of the wind turbine (s) and fairly large changes in power output.”

Is a wind turbine a low frequency source?

Hessler & Associates agreed “that a wind turbine is indeed a unique source with ultra low frequency energy” and that a “new Threshold of Perception” was needed to assess turbine noise impacts.

Can Vestas complain about turbines?

Vestas and others can complain, but the damage from turbines can no longer be ignored. There are enough turbines operating worldwide, and enough people impacted, for the public to recognize turbine noise is intrusive and potentially harmful to neighbors.

Is amplitude modulation a component of wind turbines?

CCA concedes that “…periodic amplitude modulation may be a critical component of sound from wind turbines that triggers annoyance.” And the effect is not minor. Fluctuations in actual noise levels due to amplitude modulation can vary in excess of 10 dB above predicted values while meteorological conditions can produce variations up to 14 dBA over predicted levels.

Is wind energy safe?

In late January, the Iowa Policy Project, Iowa Environmental Council, and the University of Iowa’s Environmental Health Sciences Research Center (IPP et al.) jumped on the ‘wind energy is safe’ bandwagon with a joint release claiming wind turbine noise does not pose a risk to human health. Their conclusion was based on a summary of the ‘best’ research available to IPP et.al. but mainly relied on two papers – one by the Council of Canadian Academies ( “CCA”) and a second by McCunney et al. [1]

What did Trump say about wind power?

Twitter had a field day when President Donald Trump bashed wind power, telling House Republicans: “They say the noise causes cancer.”

Do wind farms reduce cancer?

On the other hand, indirect evidence suggests that wind farms may reduce the national burden of cancer—particularly lung cancer—if they replace coal-fired electrical generating plants. Air pollution from the fine particulate matter that coal plants spew is linked to a higher risk of early death from lung cancer and cardiovascular disease.

Does wind turbine noise cause cancer?

Spoiler alert: Wind turbine noise does not cause cancer. There isn’t a scintilla of evidence in scientific literature that the noise from wind turbines is linked to cancer.

Does wind noise affect sleep?

Evidence about its effects on sleep and mood is conflicting —some studies find effects, others none. But recent studies have found no evidence that wind turbine noise affects the risk of heart attacks or stroke, birth defects, high blood pressure or diabetes.

Is coal a source of electricity?

Coal as a source of electricity is declining, however, while wind power is expanding rapidly across the United States. That may lead to many more people breathing easier in the years to come—and less lung cancer. Click here to learn more about lung cancer. Read More About:

can wind farms cause health problems

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What are the disadvantages of a wind farm?

Wind farm on the ocean. One of the disadvantages of wind power is that it is not a zero-emissions form of energy generation.A number of resources are used in the construction of wind turbines and an energy distribution system, and while generating wind power does not create emissions, emissions are involved in the maintenance of wind farms and other routine tasks which surround wind farms.

Why do people dislike wind farms?

Wind turbines can make people sick. Online forums are full of reports from turbine neighbors that the sights and sounds of the spinning blades cause headaches, nausea and other health problems …

Are wind farms bad for your health?

The most plausible health concern from proximity to wind turbines is that their noise can disturb sleep. Chronic sleep disturbance is a clear health risk, and so if this is true it would inform minimum safe distances between wind turbines and residential areas.

Are wind farms bad for the environment?

Windfarms may raise local temperatures and there are bound to be environmental effects due to increased temperatures close to windfarms as well as the reduction of air speeds downstream. However, the heat released by a windfarm is likely to have a minimal effect on global temperatures because wind energy is converted to heat eventually, regardless.

What are the symptoms of wind turbine syndrome?

Reported symptoms include headaches, nausea, sleep problems, night terrors, tinnitus, irritability, anxiety, concentration and memory problems, and issues with equilibrium and dizziness.

How tall are windmills?

Nearly 58,000 wind turbines crank out power throughout the country. These massive windmills — up to 80 feet (24 meters) tall — capture the energy in wind and convert it into free-flowing electrons that people can use to run dishwashers, air conditioning and lights.

What are the effects of wind turbines?

Some people who live in close proximity to wind turbines say they experience sleep disturbances, headaches and concentration problems. These symptoms and others could be explained as effects of infrasound, as well as constant humming and vibrations.

How many birds die from wind turbines?

Fatalities due to wind turbines are significant, but mostly for birds and bats. The U.S. Fish and Wildlife Service estimates that between 140,000 and 500,000 bird deaths occur at wind farms each year.

What is the noise produced by the movement of the blades through the air?

The rapidly spinning blades can produce a weak but distinctive noise, as well as disruptions in air pressure. The noise is generated by the movement of the blades through the air, as well as from the from the turbine machinery. Infrasound, is sound that is lower in frequency than 20 Hz or cycles per second.

What are the downsides of wind power?

­Until recently, there were three main issues regarding the possible downsides of wind power: bird and­ bat deaths, cost, and disrupting the appearance of natural landscapes.

Do wind turbines emit infrasound?

There are also mixed opinions on whether wind turbines emit infrasound and if the amount is any more than that emitted by diesel engines or waves crashing on the beach. But we do know that at high speeds, wind turbines can produce an audible hum and vibration that can be carried through the air.

How do wind turbines affect human health?

Industrial wind turbines can harm human health if sited too close to residents. Harm can be avoided if IWTs are situated at an appropriate distance from humans. Owing to the lack of adequately protective siting guidelines, people exposed to IWTs can be expected to present to their family physicians in increasing numbers. The documented symptoms are usually stress disorder–type diseases acting via indirect pathways and can represent serious harm to human health. Family physicians are in a position to effectively recognize the ailments and provide an empathetic response. In addition, their contributions to clinical studies are urgently needed to clarify the relationship between IWT exposure and human health and to inform regulations that will protect physical, mental, and social well-being.

What is the impact of IWTs on sleep?

They concluded that “the noise emissions of IWTs disturbed the sleep and caused daytime sleepiness and impaired mental health in residents living within 1.4 km of the two IWT installations studied.”14

How many witnesses did the Ontario environmental review tribunal find?

After considering the evidence and testimony presented by 26 witnesses, a 2011 Ontario environmental review tribunal decision acknowledged IWTs can harm human health:

What are the symptoms of wind turbines?

People who live or work in close proximity to IWTs have experienced symptoms that include decreased quality of life, annoyance, stress, sleep disturbance, headache, anxiety, depression, and cognitive dysfunction. Some have also felt anger, grief, or a sense of injustice. Suggested causes of symptoms include a combination of wind turbine noise, infrasound, dirty electricity, ground current, and shadow flicker.1Family physicians should be aware that patients reporting adverse effects from IWTs might experience symptoms that are intense and pervasive and might feel further victimized by a lack of caregiver understanding.

What are the effects of IWT?

An Ontario community-based self-reporting health survey, WindVOiCe, identified the most commonly reported IWT-induced symptoms as altered quality of life, sleep disturbance, excessive tiredness, headache, stress, and distress. Other reported effects include migraines, hearing problems, tinnitus, heart palpitations, anxiety, and depression.18In addition, degraded living conditions and adverse socioeconomic effects have been reported. In some cases the effects were severe enough that individuals in Ontario abandoned their homes or reached financial agreements with wind energy developers.19

Is IWT a health problem?

Despite being widely accepted, the WHO definition of health is frequently overlooked when assessing the health effects of IWTs. Literature reviews commenting on the health effects of IWTs have been produced with varying degrees of completeness, accuracy, and objectivity.22Some of these commentators accept the plausibility of the reported IWT health effects and acknowledge that IWT noise and visual effects might cause annoyance, stress, or sleep disturbance, which can have other consequences. However, these IWT health effects are often discounted because “direct pathological effects” or a “direct causal link” have not been established. In 2010, the Ontario Chief Medical Officer of Health released The Potential Health Impact of Wind Turbines,which acknowledged that some people living near wind turbines report symptoms such as dizziness, headaches, and sleep disturbance but concluded “the scientific evidence available to date does not demonstrate a direct causal link between wind turbine noise and adverse health effects.”23The lead author of the report,23Dr Gloria Rachamin, acknowledged under oath that the literature review looked only at direct links to human health.24

Is noise annoyance a health risk?

Noise-induced annoyance is acknowledged to be an adverse health effect .27–30Chronic severe noise annoyance should be classified as a serious health risk.31According to the WHO guidelines for community noise, “[t]he capacity of a noise to induce annoyance depends upon many of its physical characteristics, including its sound pressure level and spectral characteristics, as well as the variations of these properties over time.”32Industrial wind turbine noise is perceived to be more annoying than transportation noise or industrial noise at comparable sound pressure levels.33Industrial wind turbine amplitude modulation,34audible low frequency noise,35tonal noise, infrasound,36and lack of nighttime abatement have been identified as plausible noise characteristics that could cause annoyance and other health effects.

What is the greatest source of conflict between landowners and wind companies?

By far the greatest source of conflict between landowners and wind companies is complaints about the health effects the spinning turbines have on those exposed to them on a daily basis.

What is the report "In the Shadow of Wind Farms"?

The report, “In the Shadow of Wind Farms,” is an in-depth investigation of the wind industry’s effect on predominantly rural communities where turbines have been erected. During the course of the six-month investigation, the authors interviewed more than 70 families living near three-dozen proposed or current wind installations. They also spoke with 10 state and local lawmakers, examined hundreds of pages of public-service-commission records about wind-energy projects, reviewed court filings in seven wind-related lawsuits, and inspected lease agreements for at least eight wind facilities on private land.

How tall is Lake Winds Energy?

In rural Mason County, Michigan, for example, Cary and Karen Shineldecker say they suffered anxiety, headaches, ear pressure, tinnitus, heart palpitations, and sleep disturbances after Lake Winds Energy began operating its 476-foot-tall turbines around their home. After unsuccessfully fighting the wind farm, they sold their property at a loss just to escape the nuisance.

How much does Barber County get from Flat Ridge Wind?

Some communities receive fixed annual payments instead of tax revenues. In one case cited in the report, Barber County, Kansas gets $500,000 a year from the Flat Ridge Wind Project, plus an additional $5,000 for every megawatt of power the project produces.

Where are wind turbines located?

Although the first wind facilities were located in sparsely populated areas such as California’s Mojave Desert, today thousands of turbines can be found in every region of the country, except for the Southeast, where unfavorable wind conditions and a lack of state renewable-energy mandates (save for North Carolina) have limited the growth of the industry.

Can landowners terminate wind turbine contracts?

The contracts typically do not allow property owners to terminate the agreements, even if they are seeking relief from what they say are intolerable living conditions caused by the turbines.

Is Shirley Wind Farm a health hazard?

A chorus of similar complaints about the Shirley Wind Farm in Brown County, Wis consin prompted the local Board of Health to declare the turbines a health hazard. Dozens of residents of Falmouth, Massachusetts complained of nausea, dizziness, migraines, and anxiety after Notus Clean Energy erected a wind turbine in their community. In Calhan, Colorado, four families told investigators they left their homes and moved away to escape the Golden West Wind Energy Center. Hundreds of people nationwide have filed similar complaints.

How much does Nextera pay for wind turbines?

Spencer Jenkins, a developer for NextEra Energy, told a House committee in February that NextEra’s Pratt County wind farm will pay landowners $1.5 million each year. For 109 turbines, that is $14,000 per turbine. However, wind farm opponents say some of these agreements go beyond standard confidentiality clauses.

What bill would have prevented wind turbines from being less than a mile and a half from any residence?

Horsch testified at a Statehouse hearing in February before the House committee on Energy, Utilities and Telecommunications, which was considering a bill (HB 2273) that would have prevented wind turbines from being less than a mile and a half from any residence.

What is the Nocebo hypothesis?

A paper published in November 2014 in Frontiers in Public Health offers an explanation, making the case for what is called the “nocebo expectations hypothesis.”. The nocebo effect is related to its better- known sibling, the placebo effect. Or, if you expect to get sick, you just might.

Why are there no property sales to evaluate on a wind farm?

Appraisers contacted for this story said there were no property sales to evaluate, largely because the wind farm footprint contained so few homes.

What is the Rorschach test for the 21st century?

Wind turbines may be the Rorschach test for the 21st century.

How much does wind reduce property value?

Property values. Several said property value studies conclude that wind farms can reduce residential home values by as much as 40 percent.

How much does a gag order pay?

The gag order is one of them. Participation agreements pay around $1,000 a year.

What are the symptoms of wind turbines?

In places like Massachusetts, New York, and Vermont where industrial wind turbine projects have recently been introduced, residents have reported symptoms such as nausea, sleep disorders, fatigue, and increased stress that they account to a low-frequency hum—a combination of audible bass sounds and inaudible vibrations—generated by the turbines.

Do wind turbines affect quality of life?

However, the results of the two studies deviated in one interesting way. The recent analysis found that the closer the respondents lived to wind turbines the lower they ranked the quality of life of their environment. The original study found no link between sound levels and these quality of life ratings. Though because there is no baseline data for the sample, Sulsky said, it’s difficult to distinguish whether respondents were dissatisfied before the wind turbines were installed.

Does wind turbines cause sleep disturbances?

The study, published in the June issue of The Journal of the Acoustical Society of America , found no direct link between residents’ distance from wind turbines in Ontario and Prince Edward Island and sleep disturbances, blood pressure, or stress. The stress levels were both self-reported and measured via hair cortisol levels, a hormone secreted under stress that prepares the body for its fight-or-flight response.

Is wind energy safe for humans?

The United States ranks first in the world for electricity generated from wind, according to the Department of Energy. But for some, the shifting winds of the renewable energy revolution isn’t a pleasant one. Twenty-five peer-reviewed studies have found that living near wind turbines does not pose a risk on human health.

Which country has the most wind energy?

Today, the United States ranks first in the world for electricity generated from wind, according to the Department of Energy . But for some, the shifting winds of the renewable energy revolution isn’t a pleasant one.

Is the Nocebo effect a placebo?

With no proven biological basis for the reported symptoms, some have pointed to the “nocebo effect” as the cause of the complaints. The nocebo effect is akin to the placebo effect, where an individual’s positive perception towards a drug or treatment produces positive results, except in the nocebo effect, it’s negative attitudes and negative results.

Who lives less than a mile from a 400 foot wind turbine?

In one case, a resident named Luann Therrien, who lives less than a mile from a 400-foot turbine, said she initially supported the wind projects. “We were not against the turbines before they went in [but after] we were dizzy, had vertigo like you wouldn’t believe,” she said at one hearing .

Why are wind turbines bad?

Wind turbines have come under criticism for various reasons, including killing birds and bats, being an eyesore, reducing quality of life, and negative health effects from the noise and infrasound they generate . None of these claims hold much water, but let’s take a closer look at the health effects.

How far away are wind turbines from homes?

Wind turbines are placed at least 300 meters distant from residential areas. It is definitely interesting that there is no “air conditioner syndrome” despite the fact that air conditioners generate 10 times as much noise as the closest possible wind turbine.

How loud is wind turbine?

But existing models in use generate about 105 decibels (about as loud as a lawnmower) at the source. The intensity of this sound drops off with distance. At 100 meters the noise is down to about 50 decibels, which is as loud as a medium-sized window air conditioner. At 300 meters the noise is at 40 decibels, which is as loud as a typical refrigerator. (In the decibel scale, which is logarithmic, a change in 10 decibels in a loudness factor of 10, so 50 decibels is 10 times louder than 40 decibels.)

How loud is a refrigerator?

At 100 meters the noise is down to about 50 decibels, which is as loud as a medium-sized window air conditioner. At 300 meters the noise is at 40 decibels, which is as loud as a typical refrigerator. (In the decibel scale, which is logarithmic, a change in 10 decibels in a loudness factor of 10, so 50 decibels is 10 times louder than 40 decibels.) …

Why do farmers like windmills?

Farmers in my region like windmills because they pay well. Landing a windmill farm on the farm is something to crow about. As for the eyesore aspect, I’ll admit the first time I saw a row of 17 windmills they were a bit of a shock. But in subsequent encounters while passing through by car the windmills had quickly become part of the landscape. I suspect rural locals don’t spend any time at all tilting at them.

What happens if you run a fan in a closed room all night?

In some parts of the world there is the widely-held belief of "fan death", where it is alleged that if you run a fan in a closed room all night, it will kill you. In said parts of the world indoor fans are routinely sold with timers to prevent this ghastly fate.

Do wind turbines affect health?

A 2014 study reviewed psychological factors which have been shown to influence reports of health effects from wind turbines. Subjects were more likely to report negative symptoms if they found wind turbines annoying, if they thought they were an eyesore, and if they did not gain any economic benefit from them.

What are the new noise sources?

inclusion of new noise sources, namely wind turbine noise and leisure noise, in addition to noise from transportation (aircraft, rail and road traffic);

How does noise affect health?

The public health burden from environmental noise Exposure to noise can lead to auditory and nonauditory effects on health. Through direct injury to the auditory system, noise leads to auditory effects such as hearing loss and tinnitus.

How many years of life are lost from environmental noise?

These results indicate that at least one million healthy years of life are lost every year from traffic-related environmental noise in western Europe. Sleep disturbance and annoyance, mostly related to road traffic noise, constitute the bulk of this burden. (Our emphasis) Available assessments place the burden of disease from environmental noise as the second highest after air pollution (WHO Regional Office for Europe & JRC, 2011; Hänninen et al., 2014; WHO 2014b).

Why use long-term average noise exposure indicators?

use of long-term average noise exposure indicators to better predict adverse health outcomes.

What would have added substantially to the WHO “conditional” acknowledgement of harm from wind turbine noise, would have been?

What would have added substantially to the WHO “conditional” acknowledgement of harm from wind turbine noise, would have been a hefty or certain “nod” to infra and low frequency impacts and pressure pulsation. These impacts have numerously been reported and recognized by volumes of professionals, including Dr. Mariana Alves Pereira, whose work on vibro-acoustic disease is irrefutably clear. Below, Dr. Laurie confirms the body of research conducted by NASA some thirty years ago.

How many decibels should a classroom have?

The WHO guidelines for community noise recommend less than 30 A-weighted decibels (dB (A)) in bedrooms during the night for a sleep of good quality and less than 35 dB (A) in classrooms to allow good teaching and learning conditions.

Is noise a health problem?

This Guideline recognizes that the “noise” is more than ‘annoyance’ (and “annoyance” is of lesser concern than sleep deprivation)–and that chronic noise contributes to cardiovascular disease; lack of sleep, hearing loss, tinnitus and stress; and increased changes in blood pressure and heart health. These, of course, are well known impacts to communities and professionals worldwide. These negative impacts have, however, been slow to be recognized at levels such as the WHO.