Neighbor News
MassCEC Admits Wind Turbine Infra Sound 2016
We processed the infrasound records from the database, differentiating infrasound levels by wind speed and turbine operation (on or off)
MASSACHUSETTS STUDY ON WIND TURBINE ACOUSTICS
PREPARED FOR:
MASSACHUSETTS CLEAN ENERGY CENTER AND DEPARTMENT OF ENVIRONMENTAL PROTECTION
MASSACHUSETTS STUDY ON
WIND TURBINE ACOUSTICS
REPORT
2.18.2016
Find out what's happening in Falmouthfor free with the latest updates from Patch.
Report Massachusetts Clean Energy Center and Department of Environmental Protection
Massachusetts Study on Wind Turbine Acoustics
February 18, 2016
Find out what's happening in Falmouthfor free with the latest updates from Patch.
Page 124 to 126 of the report
8.3 | INFRASOUND LEVELS IN THE BACKGROUND AND FROM WIND
TURBINES
We processed the infrasound records from the database, differentiating infrasound levels by wind speed and
turbine operation (on or off). For each 1/3-octave band from 0.5 Hz and above, we then calculated the mean
level with a 95% confidence interval. These results are shown in Figure 74 for Site 8A and Figure 75 for Site
8B.
In both figures, the exterior sound levels span the range of 1/3-octave bands from 0.5 Hz to 20 Hz. Sound
levels are unweighted (dBZ). The Watanabe and Moller (1990) threshold of audibility is shown in blue, and
the 90 dBG contour is shown in red. Combined, these are a conservative estimation of audibility along the
entire infrasonic range. The arithmetic mean sound levels with the turbines off are shown with black markers;
those with the turbines on are shown with orange markers. The 95% confidence intervals are shown as lines
above and below each point; however, the intervals are so small, that they are difficult to see. The data are
divided by ranges of wind speed. The top graph shows the results for 80-meter wind speeds of 3 to 6 m/s,
the middle graph for 6 to 9 m/s, and the lower graph for wind speeds greater than 9 m/s.
Link to entire report here :
http://files.masscec.com/research/wind/MassCECWindTurbinesAcousticsStudy.pdf
Wind Turbine Infra Sound -- Please Share This
Wind and Health by 12 year old Nathan Brown talks about wind turbine infra sound
Conversations From the Open Road
click link to watch infra sound video
Now a 12 year old understands infra sound ! How about the grown ups in Falmouth ?
