Resource Documents: Noise (552 items)
Documents presented here are not the product of nor are they necessarily endorsed by National Wind Watch. These resource documents are provided to assist anyone wishing to research the issue of industrial wind power and the impacts of its development. The information should be evaluated by each reader to come to their own conclusions about the many areas of debate.
Author: David, Antoine
- Acoustics problem[s] associated with wind-farms are due to the infrasonic and low frequencies harmonics and their interaction between several turbines. Those generate annoyances and to higher intensities health effects.
- By using both a time average and frequency weighting, by definition, all those harmonics disappear and as such no assessments ofthe impact of those harmonics can be made.
- To assess those harmonics, it is necessary to use unfiltered data and no time average.
- The low frequencies and infrasmmd effects cannot be assessed by dBA. By design, the A filtering process takes away low frequency and infrasound. Low frequencies and infrasound need to be assessed by dBlin which is unfiltered data according to frequency.
- Annoyance has not been considered in either guideline[.]
- Wind masking has been applied as if it was masking noise of similar frequencies[,] and this is not the case.
- The distance of 1500m as a buffer will not be sufficient for the current size of wind turbine. This distance had originated years ago for much smaller size turbines and at the time was probably a correct distance.
- The noise criteria proposed in the draft wind farm s[t]ate code [will] most likely not protect residents for their health and well-being and will not protect their environmental values.
- It is uncertain and unlikely that the noise criteria proposed in the draft wind farm s[t]ate code will protect animals such as farmed animals for their health and well-being from low and infrasonic noise exposure.
From: Dr Antoine David, PhD, MEng, MAAS, Technical Specialist (Noise), Technical Support Unit, Regulatory Capability and Customer Service, Department of Environment and Heritage Protectsion
Sent: Wednesday, 26 August 2015
To: Paul Roff, Manager, Environmental Planning, Department of Environment and Heritage Protection
CC: Corro EHP ESR RCaCS, Lindsay Delzoppo, Lawrie Wade, David Cook
From: Tony Roberts, Deputy Director-General, Environmental Policy and Planning, Department of Environment and Heritage Protection
Sent: Monday, 7 September 2015
To: Paul Roff, Lawrie Wade (Planning Support)
We have reviewed the draft code (noting that it is based on independent technical advice) and have no concerns.
From: Paul Roff
Sent: Monday, 24 August 2015
To: David Cook, Manager, Technical Support and Community Response, Regulatory Capability and Customer Service, Department of Environment and Heritage Protection
Cc: Carro EHP ESR RCaCS, Lindsay Delzoppo, Antoine David, Carro EHP EPP DDG, Lawrie Wade
I also have been asked to prepare a response to this letter. Lawrie Wade tells me there was a previous letter stating out position that wind farms should not be an ERA. The reply letter needs to restate out opposition to Wind Farms being an ERA.
Impact of wind turbine sound on general health, sleep disturbance and annoyance of workers: a pilot-study in Manjil wind farm, Iran
Author: Abbasi, Milad; Monazzam, Mohammad Reza; Akbarzadeh, Arash; Zakerian, Seyyed Abbolfazl; and Ebrahimi, Mohammad Hossein
Background: The wind turbine’s sound seems to have a proportional effect on health of people living near to wind farms. This study aimed to investigate the effect of noise emitted from wind turbines on general health, sleep and annoyance among workers of manjil wind farm, Iran.
Materials and methods: A total number of 53 workers took part in this study. Based on the type of job, they were categorized into three groups of maintenance, security and office staff. The persons’ exposure at each job-related group was measured by eight-hour equivalent sound level (LAeq, 8 h). A Noise annoyance scale, Epworth sleepiness scale and 28-item general health questionnaire was used for gathering data from workers. The data were analyzed through Multivariate Analysis of variance (MANOVA) test, Pillai’s Trace test, Paired comparisons analysis and Multivariate regression test were used in the R software.
Results and discussion: The results showed that, response variables (annoyance, sleep disturbance and health) were significantly different between job groups. The results also indicated that sleep disturbance as well as noise exposure had a significant effect on general health. Noise annoyance and distance from wind turbines could significantly explain about 44.5 and 34.2 % of the variance in sleep disturbance and worker’s general health, respectively. General health was significantly different in different age groups while age had no significant impact on sleep disturbance. The results were reverse for distance because it had no significant impact on health, but sleep disturbance was significantly affected.
Conclusions: We came to this conclusion that wind turbines noise can directly impact on annoyance, sleep and health. This type of energy generation can have potential health risks for wind farm workers. However, further research is needed to confirm the results of this study.
Mohammad Reza Monnazzam
Seyyed Abolfazl Zakerian
Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of
Medical Sciences, Tehran, Iran
Mohammad Hossein Ebrahimi
Department of Occupational Health Engineering, School of Public Health, Shahroud University of Medical
Sciences, Shahroud, Iran
Journal of Environmental Health Science & Engineering (2015) 13:71
Author: Krisselbrink, Barry
I am writing asking for your support in requesting the CAW [Canadian Auto Workers] to remove the wind turbine which is currently on their property.
As a Developer in the area, I have had sales in the southwest end of Port Elgin fall through because of the noise and health concerns created as a result of the wind turbine running. I have been advised by real estate agents that people won’t even look at properties at that end of town. The value of the land and homes in this area has greatly depreciated due to the wind turbine and is making it challenging to recoup the costs of developing land in this area. This will also impact the Town in the amount of taxes and development fees it will be able to collect.
Homeowners who purchased homes from me in this area and prior to the wind turbine are advising me that they are now suffering from dizziness, vertigo, extreme headaches and vision problems. People are also suffering from high blood pressure, black spots in their vision, nosebleeds and loss of concentration, among other issues. Their health had been fine prior to the wind turbine starting up and this is not what they signed up for when they bought their homes.
We have been constructing homes in Port Elgin for many years and this has been the first time our company is opposing something such as this wind turbine. However, this turbine has been constructed in a very poor location as the revised regulations show. And we are prepared to support all those affected by this wind turbine in having it removed and located to a more appropriate location conforming to the new regulations.
Thank you for your support on this request. Please contact me if I can be of any further assistance in the above-noted matter.
Barry’s Construction and Insulation Ltd.
TO: Council, Town of Saugeen Shores, Port Elgin, Ontario
August 8, 2013
Author: Stelling, Keith; and Multi-Municipal Wind Turbine Working Group
Typically, regulating authorities have not required the measurement of infrasound (sound below 20 Hz in frequency) and low frequency (LFN) (generally sound from 200 Hz to 20 Hz) inside homes adjacent to wind turbines as a condition of their installation and operational monitoring. The health risk of infrasound from wind turbines has been dismissed by the wind industry as insignificant. It has maintained that since the typical loudness and frequency of wind turbine sound within a home is not audible, it cannot have any effect on human health.
Noise measurements for most studies and environmental assessments have been limited to the measurement of audible sound outside homes– using dBA weighted monitoring which is insensitive to infrasound frequencies. Some studies and environmental assessments have even relied on projected audible sound averages from computer produced models.
Such observations and projections fail to take appropriate account of the distinguishing signature of the sound from a wind turbine. Unlike the more random naturally occurring sounds (such as wind or lake waves which may themselves have an infrasound component), the sound from wind turbines displays characteristics that produce a pattern that the ear and audio processing in the brain recognize. Our hearing is strongly influenced by pattern recognition. (This is why we can pick out the sound of a familiar voice even in a crowded room with many people speaking).
One recognizable wind turbine pattern is a tonal signal of sharply rising and falling pulses in the infrasound range, (typically about 0.75 Hz, 1.5 Hz, 2.25 Hz, 3.0 Hz, and so on). It is produced by the blade passing the tower. At this frequency these pulses may be “felt or sensed” more than “heard” by the ears. Research by Dr. Alec Salt and others has demonstrated that subaudible infrasound does result in a physiological response from various systems within the body.
The second recognizable pattern is the amplitude modulation. This is the typical “swoosh” rising and falling that is audible.
A third recognizable pattern of sound from wind turbines results from the equipment in the nacelle (such as the gearbox if the turbine has one) and ventilating fans. Although in some cases this third sound source may become predominant, it is usually of lesser effect that the first two.
We now know that subaudible pulsating infrasound can be detected inside homes near operating wind turbines. It can also be identified up to 10 kilometres distant. We know also that very low levels of infrasound and LFN are registered by the nervous system and affect the body even though they cannot be heard. The research cited in this report implicates these infrasonic pulsations as the cause of some of the most commonly reported “sensations” experienced by many people living close to wind turbines including chronic sleep disturbance, dizziness, tinnitus, heart palpitations, vibrations and pressure sensations in the head and chest etc.
Similarly, there is medical research (also cited below) which demonstrates that pulsating infrasound can be a direct cause of sleep disturbance. In clinical medicine, chronic sleep interruption and deprivation is acknowledged as a trigger of serious health problems.