Acoustician to present on infrasound, turbines at selectmen meeting
Acoustician and infrasound expert Stephen Ambrose will give a half-hour presentation on wind turbines to selectmen at their meeting Monday.
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#1 Jun 1, 2013
State officials were always aware of different types of noise from commercial wind turbines.
In the past politicians blamed University of Massachusetts engineering students for not including negative information to local towns in the process of building commercial wind turbines.
Types Of Noise - They always were aware of : "regulatory" and "human annoyance"
Officials have known since 2006 that commercial megawatt turbines give off several types of noise.The types of noise were "regulatory" and "human annoyance" as reported in a wind study for Mattapoisett in 2006.
A Cape Cod town zoning board recently declared its turbine noise a nuisance. The Cape town residents referred to noise annoyance as headaches, loss of balance, heart palpitations, shortness of breath, memory loss, unable to focus, unable to concentrate.
"Human annoyance" was brought up on page 14 of a noise study for Mattapoisett. The report states that residential homes must be taken into consideration when building wind turbines.
This is portion of that report:
"Wind Power in Mattapoisett, Marion & Rochester: Siting Considerations for a Met Tower and Fatal Flaws Analysis for a Wind Turbine."
2006 Page 14
Noise considerations generally take two forms, state regulatory compliance and nuisance levels at nearby residences:
A. Regulatory compliance: Massachusetts state regulations do not allow a rise of 10 dB or greater above background levels at a property boundary (Massachusetts Air Pollution Control Regulations, Regulation 310 CMR 7.10). This sound level is very unlikely to be a reached incase at the sites we examined.
B. Human annoyance: Aside from Massachusetts regulations, residences must also be taken into consideration. Any eventual turbine would be sited such that it would be inaudible or minimally audible at the nearest residences. At this stage, to check for fatal flaws, a rule of thumb can be used: to minimize possible noise impacts,site wind turbines at least three times the blade tip height from residences. Distances from mixed-use areas may be somewhat shorter.
Please see page 14 of this report :
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