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Learn About Turbine Infrasound

How to measure infra sound and make yourself familiar with infra sound and the testing process.   The test at the Shirley Wind Farm in Brown County, Wisconsin also describe the ill effects found in the studies.   There is a machine that can measure infra sound. It's called an INFILTEC INFRA-20 . It was used at the Shirley Wind Farm in Brown County, Wisconsin   The information below describes the equipment and use by Robert Rand of  Rand Acoustics, Brunswick, ME
Principal: Robert Rand
  The  INFILTEC INFRA-20 measures infra sound http://www.infiltec.com/Infrasound@home/     A Cooperative Measurement Survey and Analysis of
Low Frequency and Infrasound at the Shirley Wind Farm in
Brown County, Wisconsin
http://psc.wi.gov/apps35/ERF_view/viewdoc.aspx?docid=178263   2.1 Equipment page 33 of 51 on the PDF reader
Equipment used by Mr. Rand included:
Gras 40AN microphone
Larson Davis Type 902 Preamplifier
Larson Davis Type 824 Sound Level Meter
M-Audio MicroTrackII 24-bit line-level audio recorder
Bruel & Kjaer Type 4230 Acoustic Calibrator
SoundDevices USBPre audio interface
Infiltec Model INFRA-20 seismometer (acoustic pressure, 0.1 to 20 Hz)
SpectraPlus 5.0 acoustic analysis software
Amaseis helicorder datalogger software

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