Created by the following organizations:
BCCRWE, Brown County Citizens for Responsible Wind Energy – Brown County
CCCRE, Calumet County Citizens for Responsible Energy – Calumet County
Concerned Citizens of Smelser & Paris Township, Grant County residents – Grant County
Concerned Citizens of Trempealeau County – Trempealeau, Monroe, Rock, LaCrosse, and Dane counties
Forest Voice – St Croix County
Forward Wind Factory Victims Coalition – Fond du Lac County
Glenmore Constitutional Coalition – Brown County
Western Wisconsin Landowners Alliance – Monroe County
WINDCOWS, Wisconsin Independent Citizens Opposing Wind Turbine Sites – Manitowoc & Kewaunee Counties
Wind Turbine Setback
Real Property Value Protection Plan
Citizen and Consumer Protection
Site Reclamation / Decommissioning
Wildlife / Environmental / Domestic Animal Studies and Protection
Wind Turbine Lighting
Change of Developer / Owner / Operator
Shared Revenue Protection
Audible Sound Limit
- No Wind Turbine or group of Wind Turbines shall be located so as to cause an exceedance of the pre- construction/operation background sound levels by more than 5 dBA anywhere on receiving Non-Participating property(s). The background sound levels shall be the dBA L90A sound descriptor measured during a pre-construction noise study during the quietest time of the evening or night. All data recordings shall be a series of contiguous ten (10) minute measurements. L90A results are valid when L10A results are no more than 10 dBA above L90A for the same time period. Noise-sensitive sites are to be selected based on the wind development’s predicted worst-case sound emissions (in dBA and dBC), which are to be provided by the Developer/Owner/Operator. This includes the compounding effect that multiple Wind Turbines have on noise-sensitive sites.
- Certain types of noise are more detrimental to some people than to others. As such, the following adjustments are to be made for compliance:
- A 5 dB penalty is applied for tones as defined in IEC 61400-11
- A 5 dB penalty is applied if a sound has an audible cyclic variation in sound level such as beating or other amplitude modulation.
Low Frequency Sound Limit
- The dBC sound levels from the Wind Turbines, anywhere on the receiving Non-Participating property(s), shall not exceed the lower of either:
- dBC less dBA L90A greater than 20, or
- A maximum not-to-exceed sound level of 50 dBC from the Wind Turbines without other ambient sounds for properties located at one mile or more from State Highways or other major roads or 55 dBC for properties closer than one mile. These limits shall be assessed using the same nighttime and wind/weather conditions required in section I.A.1. Wind Turbine operating sound emissions (dBA and dBC) shall represent worst-case sound emissions for stable nighttime conditions with low winds at ground level and winds sufficient for full operating capacity at the Wind Turbine hub.
- If computer modeling or sound testing at any time shows a difference between dBC and dBA sound level measurements that is more that 10 dB, a frequency analysis shall be performed to determine the source and nature of the low frequency sound. If the Wind Turbines are the source, the degree of impact on residents and animals shall be determined and action taken to eliminate the impact.
This article is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.